Fuels containing organic compounds of boron and phosphorus



haloalkyl phosphite; phosphonite' or phosphinite. u reaction proceeds, for example, according to thescheme:

United States Patent 3,232,723 FUELS CONTAINING-ORGANIC COMPOUNDS OF BORON'AND PHOSPHOR-US James L. Dever, Winchester, Mass, and Gail H. Birum, 'Kirkwood, Mo.,-- assignors-to Monsanto-Company, a

corporation of Delaware i ,No Drawing. "Original applicationiMar: 26, 195, sea

No; 800,656, new PatentNo. 3,014,952, dated- Dec-.26, 1961; Divided and this applica'tiodNov. 3, 1961, Ser.

: i. w l I This application is a division of our coapending appli-- consisting of chlorine and bromine'linked to the boron atomthereof, a carbonyl'compound, and an alkylor The wherein R is selected from the class consisting of hydrocarbyl hal'ohydrocarbyh, hydrocarbyloXy-, halohydrocarbyloxy-, hydrocarbylthioand halohydrocarbylthioradicals wherein the hydrocarbyl group-has fromklto 12 carbon atoms; (aIkyD N-radicals having from 1- to carbon atoms in each alkyl group;

radicals wherein D represents the necessary atoms to complete a saturated N-hetero ring Qfffl'Ol'l'l 2 =to -5 carbon atoms; and wherein two, Rs taken toget-herstand for a bivalent O-alkylene-O-radical having from 2 to 4 carbon atoms in the alkylene chain and a total of from 2 to 12 carbon atoms; n'is an integer of 0 to 2; X is selected from the class consisting of chlorine and bromine; Y is selected from-the class consistingof hydrogen and alkyl radicals of from 1 to 12 carbon atoms when n is zero; and when n is 1 to2, Y is selected from the class consisting of hydrogen and the radicals: alkyl of from 1 to 12 carbon atoms,- furyl, thienyl and benzenoid hydrocarbon which are free of aliphatic unsaturation-and contain from 6 to 12 carbon atomsyandsaid radicals carrying a substituent selected fromthe classconsisting of halogen, cyano, methylenedioxy, alkyl,-Q-alkyl and '-'COOalkyl"where the alkyl radical has from 1 to 5 carbon atoms; Z is selected from the class consisting of hydrogen and alkylradicals of from I to 3carbonatoms and is alkyl only where n is from 1 to 2 and Z and Y taken together complete a cycloalkane ring having from 5 to 6 canbon atoms in the ring and a total of from 5 to 10 carbon atoms; T is selected from the class consisting of alkyl and haloalkyl radicals of from 1 to 1'-2=carbon atoms; and each-A is selected from the class consisting of OT and hydrocarbyl radicals which are free .as tollowszu. iv ,a

3,232,723 Patented Feb. 1, 1966 of aliphatic unsaturation and contain from 1 to 12 carbonfatonisvm. .ti

The number of phosphinyl radicals present in the .presently provided;compoundsithlus depends-upon the number. of.halogen .attomsrpresent in the; halogen-containing boron componndfwhich 'is used in th e L reaction, When :only onewhalogen atom is present, the reaction proceeds RBX: j2e=0 2A- i OT nmo hi a'hwrx When three halogen atoms are present, the reaction is: JI't i QlJ. t; ;.:.i-'-.;: v v. BX: +i3d=o sar -o'r ism-e i"-Ala a'rx Presently useful boron compoun'dsi having halogen linked to the boron atom thereof are compounds of J the wherein R is a hydrocarbyl radical of from 1 to 12 wtca'nbon ":atoms or said-m hydrocarbyl radical containing halogen substitutionandtX is chlorine or bromine, ;Also

-- presently'u'seful aretthe/ compounds was. Q

- and -R is as above defined Also, presently usefiuhare of'theiormula V where denotes a saturated N -heterocyclic radical of from 2 to wherein R" is a bivalent alkylene radical having from 2 to 4 carbon atoms in the alkylene chain and a total of from 2 to 12 carbon atoms.

Examples of boron-halogen compounds insofar as BX is concerned are boron trichloride, boron tribromide and the mixed boron bromide chlorides.

Compounds of the formula R'OBX wherein R and X are as defined above are dichlorohydrocarbyloxybcranes, dibnomohydrocarbyloxboranes or bromochlorohydrocarbyloxyboranes. The hydrocarbyl radical may be alkyl, alkenyl, alkynyl, cycloa-lkyl, aryl, alkaryl, or aralkyl and such hydrocarbyl radicals may be substituted by one or more atoms of halogen. Examples of thepresently useful dichloro-, dibnomm, or bromochloroalkoxyboranes, -alkenyloxyboranes, or -a1kynyloxyboranes are dichloromethoxyboraue, dichloroethoxyborane, dichloroisopropoxyborane, dichloroallyloxyborane, dichloro-n-butoxyborane, dichloro-Z-butenyloxyborane, dichloropentyloxyborane, d-ichlorohexyloxyborane, dichloroheptyloxyborane, dichloro-Z-pentynyloxybcrane, dichloro 2 ethylhexyloxyborane, dichloro-tert-nonyloxyborane, dichloro- 2 propynyloxyborane, dichloroundecyloxyborane, dichlorododecyloxyborane, dibromornethoxyborane, dibromo 3 decenyloxyborane, dibromobutoxyborane, dibromohexyloxyborane, dibromo 2 ethylhexyloxyborane, dibromodecyloxyborane, dibromododecyloxyborane, bromochloromethoxybcrane, bromochloropropoxybroane, bromochloropentyloxyborane, bromochlorooctyloxyborane, bromochlorododecyloxybrane, etc.

Examples of the presently useful dihaloalkoxyboranes, dihaloalkenyloxyboranes or dihaloalkynyloxyboranes having halogen substitution in the alkoxy, alkenyloxy or alkynyloxy radical are dichloro(2 chloroethoxy)borane, dibromo(2 chloroallyloxy)borane, dichloro(2 chloropropoxy)borane, dibromo(tribromobutoxy)borane, chlorobromo(2 chloro hexynyl)borane, dichloro(3- fluoropropoxy borane, dichloro (2-chloro-4-pentenyloxy) borane, dichloro (2-iodopropoxy)borane, dichloro(chlorododecyloxy)borane, etc.

Examples of the presently useful cycloalkoxy or halocycloalkoxy dihaloboranes are dichlorocyclohexyloxyborane, dichlorocyclopentyloxyborane, dibromo-Z-methylcyclopentyloxborane, dichloro 4 isopnopylcyclohexyl' oxyborane, dichloro 2,4 dichlorocyclopentyloxyborane, dibromo 3 propen 2 ylcycohexyloxyborane, dibromo- 2 fluorocyclopentyloxyborane, dichloro 2 iodo 4- methylcyclohexyloxyborane, etc.

Examples of the benzenoid dihaloboranes are dichlorophenoxyborane, dichloro aor B naphthyloxyborane, dichloro 4 biphenylyloxyborane, dibromo 4 ethylphenoxyborane, dichlorobenzyloxyborane, dibromo-2- phenylethoxyborane, bromochloro 4 isopropylbenzyloxyborane, dichloro 4 penten 2 ylbenzyloxyborane, dichloro a. naphthylmethoxyborane, dichloro-4-tolyloxyborane, etc.

Compounds of the formula R'SBX wherein R and X are as defined above, are d-iha-lohydrocarbylthioboranes. Such compounds are, e.g., dichloromethylthioborane, dibromoethylthioborane, dichloro n propylthioborane, dichloro 5 hexenylthioborane, bromochlorobutylthioborane, dichloro 2 ethylhexylthioborane, dichlorocyclohexylthioblorane, dichloro 2 propynylthioborane, dibromocyclopentylthioborane, dichloro 2 methylcyclopentylthioborane, dichloro (2 chloroethylthio)borane, dich1oro(3 iodopropylthio)borane, dibromo(3,3 dibromopropylthio)borane, dichloro(2 fluoroethylthio)- borane, dichloro(trichlorooctylthio)borane, dibromo- (bromododecylthio)borane, dichloro(Z-chlorocyclohexylthio)borane, dichlorophenylthioborane,' dichlorobenzylth-ioborane, dibromo a naphthylthioborane, dichloro- 2-vinylphenylthioborane, dichloro 4 biphenylylthioborane, dichloro(4 chlonophenylthio)borane, dichloro- (pentachlorophenylthio)borane, dibromobx bromonaphphylthio)borane, dichlor0[4 (trifluoromethyl)- phenylthio1borane, brcmochlorot l c r y lborane, dibromo(4 iodophenylthio)borane, dichloro" (octachlorobiphenylylthio)borane, etc.

Presently useful compounds of the formula (ROhBX wherein R and X are as defined above, are halodihydrocarbyloxyboranes or halobis(halohydrocarbyloxy)boranes, e.g., chlorodiethoxyborane, chlorodipropoxyhm rane, chlorodi 2 propenyloxyborane, chlorodi n. butoxyborane, chlorobis(2-ethylhexyloxy)borane, bromodidecyloxyblorane, chlorodidodecyloxyborane, chlorodi 4 pentynyloxyborane, chlorobis (2 chloroethoxy)-- borane, chlorobis(2 chloropropoxy)borane, bromobis- (tetrachlorooctyloxy borane, chlorodiphenoxyborane, chlorobis(2,4 dichlorophenoxy)borane, bromobis(2- fluoroethoxy)borane, chlorodibenzyloxyborane, chloro benzyloxybutoxyborane, chlorobis(phenylethoxy)borane, bromobis(2,4 dichlorophenoxy)borane, chlorodicyclohexyloxyborane, chloro(2,4 dichlorocyclopentyloxy)- borane, etc.

Also useful for the present purpose are halobis (hydrocarbylthio)boranes, e.g., compounds of the formula (RS) BX wherein R and X are as defined above. EX- amples of such compounds are, e.g., chlorobis(methylthio)bo1'-anes, chlorobis(ethylthio)borane, chlorobis(2- butenylthio)borane, bromobis(butylthio)borane, chlorobis(n octylthio)borane, chlorobis(2 pentynylthio)bo rane, chlorobis(dodecylthio)borane, chlorobis(pheny1- thio)borane, bis(benzylthio)chloroborane, bis(4 butylphenylthio) chlo rob orane, chlorobis(naphthy1thio )bo rane, chloro(phenylthio) (propylthio)borane, chlorobis-- 2 chloroethylthio)borane, chlorobis(cyclohexylthio)- b'orane, etc.

Also provided by the invention are halohydrocarbyloxy(hydrocarbylthio)boranes, i.e., compounds of the formula O-R RSIEBX wherein R and X are as above described. Such compounds are, for example, chloroethoxy(methylthio)borane, chlorobutoxy(propylthio)borane, bromopentenyloxyl(phenylthio)borane, chloronaphthyloxy(p-tolylthio)- borane, chloroheirynyloxy(pentylthio)borane, chloro(2- chloroethoxy) (biphenylylthio) borane, chloro(pentachlorophenylthio)ethylborane, etc.

A very valuable class of the presently useful halides includes the halodihydrocarbylboranes, i.e., compounds of the formula R BX inwhich R and X are as above defined. Such compounds are chlorodiethylborane, chlorodipropylborane, chlorodi-Z-butenylborane, chlorodidodecylborane, chlorodi-2-propynylborane, bromobis(2-ethylhexyl)borane, chlorodiphenylborane, chlorobis(B-chlorovinyl)borane, chlorodi-a-naphthylborane, bromo-a-naphthylphenylborane, chloroethylphenylborane,

bromo (4-bromophenyl) fi-naphthylborane, chlorodi-p-tolylborane, chloro(bischloroethyl)borane, chlorodicyclohexylborane, chlorocyclopentylphenylborane, etc.

Also useful in the reaction with carbonyl compounds and phosphites, phosphonites, 0r phosphinites are the halohydrocarbylhydrocarbyloxyborane-s, i.e., compounds of the formula V on R'1'3X and en n'iax v wherein R and X are as above defined. Examples of suchcompounds are chloromethylmethoxyb orane, chloroethylphenoxyb oran'e, chloro(2-chloroethyl)ethoxyborane,

chlo ro-4-pentynylethoxyborane,

bromop entyldo decyloxyborane, chloro-B-naphthyl-fl-n aphthyloxyborane, biphenylylchlorophenyloxyborane,

chlorode cylprop oxyborane, chlorocycloalkylbutoxyb orane, chlorocyclopentylcyclopentyloxyborane, chlorobenzyl-p-tolyloxyborane,

chloro (phenylethyl) benzyloxyborane, chloroethyl(ethylthio) borane,

chloro -2-butenyl phenylthio) bonane, ch-loro-n-octyl dode cylt=hio borane, bromobutyl (cyclohexylthio) borane, bromoheptyl (fi-naphthylthio) bora-ne, chlorobenzyl (benzylthio) borane,

chlorophenyl 2,4-dichlorophenylthio borane, chloro (2-ch1oroethyl -1 l-dode cenyloxyborane, chloro 2-chloroethyl) (2-chloroethylthio )borane, chlorophenyl (Z-chloropropylthio) borane, chloro (Z-fluoropropyl) (phenylthio borane, etc.

A further class of presently useful halogemcontaining boron compounds comprises the dihalohydrocarbylboranes, i.e., compounds of the formula RBX wherein R is a hydrocarbyl or *halohydrocarbyl radical of from 1 to 12, carbon atoms and X is chlorine or bromine. Examples' of such compounds are the aromatic compounds such as dichlorophenylborane, dichloro-aor fi-naphthylborane', dichloro(2-, 3- or 4-chloropheny1)borane, dibromo(4 ethylphenyl)borane, dichloro-4-propen 2 ylphenylborane, and dichloro-p-tolylborane; the aliphatic dihalohydrocarbylboranes such as dichloromethylborane, dichloroethylborane, dichloro-S-hexenylborane, dichloro- (2-chloroethyl)borane, dibromo-Z-propynylborane, dibromo(tribromobutyD'borane, dichloro( 2 ethylhexyl) borane, dichloro( chlorodecenyl)b orane, dichlorododecyl borane and bromochloropentylborane; the alicyclic compounds such as dichlorocyclohexylborane or dichloro-Z- methylcycl opentylbortane, etc.

Also presently useful are dihalodialkylaminoboranes, i'.e., compounds of the formula (alkyD N-BX wherein the alkyl radical has from 1 to 5 carbon atoms. Examples of such compounds are dichlorodimethylamino borane, dichlorodiethylarninoborane, dichlorodi-n-butylaminoborane, dichloroethylpropylaminoborane, bromochlorodibutylaminoborane, dichlorodipentylaminoborane and dichloroethylmethylaminoborane.

Still another class of presently useful halogenated boron compounds includes the N-hetero'cyclicdihalo'bonanes, e.g., compounds of the formula in which denotes a saturated N-heterocyclic radical of from 2 to 5 carbon atoms and X is as defined above. This includes dichloromorpholinoborane, dichloroaziridinoborane, and dichloropiperidinoborane, i.e., compounds of the formula CH2-CHz O\ /N-B Clg GH -0H2 NB o1, CH2

C H2C H2 CH, N-B on OHz-C H, Thecorresponding dibromides are similarly useful.

Also useful are the mono-halohydrocarbyldialkylamh noboranes and the mono-halohydrocarbyl-N-heterocyclicboranes, i.e., compounds of the formula 1|! (alkyl) -NBX and- R! 1') IHQX e.g., compounds such as chloroethyldiethylaminoborane, chlorophenyldipropylaminobcrane, chloroethylmorpholinob-onane, chlorophenylpiperidinoborane and aziridinochlorornethylborane.

Also useful are the halodialkylaminohydrocarbyloxyboranes and the corresponding thio compounds, i.e., compounds of the formula OR (alkyl) zN-f! X SR (alkyl) 2N][3 X in which R and X are as herein defined. Of these, chlorodiethylaminopropoxyborane, butoxychlorodimethylaminoborane, bromodibutylaminophenoxyborane, benzylo-Xychlorodipentyltaminoborane, chlorodirnethylamino (phenylthio borane and chloro (chlorododecylthio diethylamino borane are illustrative.

Of pronounced utility in the presently provided process are halogenated ring compounds of borane. Such compounds have the formula Q /]B X Where R" is a bivalent alkylene radical having from 2 to 4 carbon atoms in the alkylene chain and a total of from 2 to 12 carbon atoms. This includes the 2-chloro-l,3,2-

dioxaborolanes, the 2-chloro-1,3,2-dioxaborinanes and the 2-ch1oro-1,3,2-dioxaborepanes as well as the corresponding 2-bromo compounds and alkyl derivatives of either the brcmo or chloro compounds, e.g.,- 2-chloro-5,5-diethyl-1,3,2-dioxaborinane, 2 chloro-4,4,6-trimethyl-l,3,2- dioxaborianane, 2 chloro 5 methyl-S-ethyl-d,3,2-dioxaborinane, 2-chloro-4-n-octyl-1,3,2-dioxaborinane, 2-chloro- 4,4,5 ,S-tetramethyI-1,3,2-dioxaborolane, 2- chloro-5,5-dibutyl 1,3,2 dioxaborolane, 2-chloro-5,5-dimethyl-1,3,2- dioxaborinane, 2 chloro-4-pentyl-5,S-dibutyl-1,3,2-dioxaborolane, 2-chloro-4,7-dimethyl-1,3,2-dioxaborepane, 2 chloro-5,5-dimethyl-6,6-dimethyl-1,3,2-dioxaborepane, 2- chloro-5,6-di-n-butyl-1,3,2-dioxaborepane and 2-chloro-4- butyl-7-isopropyl-l,3,2-dioxaborepane.

Any of the above described halogen-containing boron compounds can be reacted with a carbonylic compound and a triorgano phosphite, phosphonite-or phosphinite to give the phosphinyl esters of boron acids. Useful carbonylic compounds are, generally, aldehydes of from 1 to 13 carbon atoms and ketones of from 3 to 14 carbon atoms. However, in some instances the aldeliydes appear to participate in the reaction more readily than the ketones. The presently useful aldehydes have the formula YCHO in which Y is selected from the class consisting of hydrogen and alkyl radicals of from 1 to 12 carbon atoms when n is zero and whenn is '1 to2, Y selected from the class consisting of hydrogen and the radicals: alkyl of from 1 to 12 carbon atoms, furyl, thienyl and benzenoid hydrocarbon which are free of aliphatic unsaturation' and contain from 6 to 12 carbon atoms and said radicals carrying a substituent selected from the class consisting of halogen,

cyano, methylenedioxy, alkyl, -O-alkyl and -COOalkyl where the alkyl radical has from 1 to 5 carbon atoms. Owing to their easy availability, a particularly useful class of aldehydes includes the fatty aldehydes of from 1 to 12 carbon atoms, e.g., formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, isobutyraldehyde, valeraldehyde, isovaleraldehyde, hexanal, heptanal, Z-ethylhexanal, octanal, 2-butyloctanal, 6-methylheptanal, decanal, undecanal, Z-methylundecanal, lauraldehyde, etc.

The presence of halogen, cyano, methylenedioxy, alkyl, carboalkoxy and alkoxy substituents in the fatty aldehyde has no effect on the course of the reaction; hence, there may be employed such substituted fatty aldehydes as 3- cyanopropionaldehyde, chloroacetaldehyde, 3 butoxybutyraldehyde, 4 cyano- 2,2 dimethylbutyraldehyde, 2- ethoxybutyraldehyde, 2,3-dichloropropionaldehyde, 3-isopropoxypropionaldehyde, 2 methyl-Z-fluoropropionaldehyde, dichlorolauraldehyde, ethyl ll-formylundecanoate, succinaldehydic acid methyl ester, ethyl 4-formylbutyrate, iod-oacetaldehyde, dichloroacetaldehyde, etc.

The presently useful benzenoid aldehydes may be aliphaticaromatic or purely aromatic aldehydes which may or may not be further substituted, e.g., benzladehyde, o-, mor p-tolualdehyde, phenylacetaldehyde, 1- or Z-naphthaldheyde, biphenyl-4-carboxaldehyde, hydrocinnamaldehyde, -2,3-dichlorobenzaldehyde, piperonal, 2-, 3- 'or 4- bntoxybenzaldehyde, p-(ethoxy)benzaldehyde, 3,4-dipropoxybenzaldehyde, mor p-iodobenzaldehyde, 3,4- or 3,5 dibromobenzaldehyde, 5-tert-butyl-4-chloro-m-tolualdehyde, S-tert-butyl-S-ethOXy-otolualdehyde, Z -cymenecarboxaldehyde, 1,8-dichloro-2-naphthaldehyde, 6-methoXy-Z-naphthaldehyde, -2 cyano 1 naphthaldehyde, 4- chloro-4-biphenylcarboxaldehyde, 6-methoxy-3-biphenylcarboxaldehyde, etc.

The presently useful aldehyde may also be a heterocyclic aldehyde such as 2-, or 3-furaldehyde, S-bromoor chloro- Z-furaldehyde, 5-iodo-2-furaldehyde, S-rnethyl-Z-furaldehyde, 2- or 3-thiophenecarboxaldehyde, S-tert-butyl-Z-thiophenecarboxaldehyde, 3,S-dimethyl-Z-thi-ophenecarboxaldehyde, 4 ethoxy 2 thiophenecarboxaldehyde, 2,5 dichloro-3-thiophenecarboxaldchyde, 2,5 diethyl 3 thiophenecarboxaldehyde, etc.

Ketones, generally, are not so reactive as the aldehydes with the triorgano phosphite, phosphonate or phosphinite and the boronhalogen compound. While virtually any aldehyde reacts with said phosphite and a monoor dihalo boron compound to give the presently provided phosphinyl boron esters, only a comparatively narrow class of ketones undergo the reaction. Useful dialkyl ketones are those having from 1 to 3 carbon atoms in one alkyl radical and from 1 to 11 carbon atoms in the other radical, e.g., acetone, diethyl .ketone, ethyl methyl ketone, di-n-propyl ketone, isopropyl methyl ketone, ethyl n-propyl ketone, methyl n-octyl ket-one, n-dodecyl ethyl ketone, 2-ethylhexyl propyl ketone, etc.

The presently useful ketones may also be a-lkyl benzenoid ketones wherein the alkyl group has from 1 to 3 carbon atoms and the benzenoid radical has from 1 to 12 carbon atoms, e.g., acetophenone, propiophenone, butyrophenone, benzyl methyl ketone, u-acetonaphthone, 6-propionaphthone, m-butyronaphthone, 4-chloroacetophenone, 4-ethy1 acetophenone, 2,4-dimethyl acetophenone, 2-nhexyl acetophenone, b-iphenylyl methyl ketone, etc.

The presently useful carbony-lic compound may also be a cycloaliphatic ring monoketone having from 5 to 6 carbon atoms in the ring and a total of from 5 to carbon atoms, e.g., cyclopent-anone, cyclohexanone, 4-ethyl- 'cyclohexan-one, 2,3-di-ethylcyclohexanone, Z-pentylcyclopentanone, etc.

Triorgano phosphites which are generally useful with the carbonylic compound and the halogen-containing compound of boron, according to the invention, are either simple or mixed phosphites. Examples of useful phosphites are trimethyl, triethyl, triisopropyl, tri-n-propyl, tri-n-butyl, tri-tert-amyl, tri-n-heptyl, tris(2-ethylhexyl),

tri-n-octyl, trinonyhtridecyl, triundecyl, tri-tert-dodecyl, amyl diethyl, butyl di-n-propyl, n-dodecyl dimethyl, ethyl octyl propyl, tris(2-chloroethyl), tris(3-chloropropyl), tris(2 chloropropyl), tris(3,4 dichlorobutyl), tris-(2- bromoethyl), tris(3-iodopropyl), tris(2-fluoroethyl), tris- (dichlorododecyl), 2-chloroethyl diethyl, 3-bromopropyl bis(2-chloroethyl), diamyl trichlorooctyl, Z-chloroethyl 3- chloropropyl 3-c'nlorobutyl, 2-chloroethyl methyl propyl, tris (2,3-dichloropropyl), or tris(2-bromo 3 chloropropyl) phosphite.

Phosphonites which are useful for the present purpose are dialkyl or bis(haloalkyl) or alkyl haloalkyl hydrocarbylphosphonites of the formula wherein A is a hydrocarbyl radical which has from 1 to 12 carbon atoms and is free of aliphatic unsaturation and T is selected from the class consisting of alkyl and haloalkyl radicals of from 1 to 12 carbon atoms. Presently useful phosphonates may be, e.g., esters of alkylphosphonous acids, e.g., diethyl ethylphosphonite, dimethyl butylphosphonite, dihexyl methylphosphonite, didodecyl pentylphosphonite, bis(2 chloroethyl)dodecylphosphonite, bis(2-chloropropyl)propylphosphonite, or bis(trichlorodecyl) isopropyl phosphonite; esters of aromatic phosphonites such as diethyl phenylphosphonite, bis(2- ethylhexyl) 4-tolylphosphonite, didodecyl 2-phenylethyl phosphonite, bis(2 chloroethyl)-a.-naphthylphosphonite or bis(tetrachlorobutyl)biphenylylphosphonite; esters of alicyclic phosphonites such as dimethyl cyclohexylphosphonite, dibutyl cyclopentylphosphonite, didecyl Z-methylcyclopentylphosphonite or bis(2-chloropropyl)benzylphosphonite.

Also useful for the present purpose are esters of phosphinous acid, i.e., esters of the formula wherein A is a hydrocarbyl radical having from 1 to 12 carbon atoms and being free of aliphatic unsaturation and T is selected from the class consisting of alkyl and haloalkyl radicals of from 1 to 12 carbon atoms. The useful phosphinites may be aliphatic, aliphatic-aromatic, aromatic or cycloaliphatic, e.g., methyl diphenylphosphinite, butyl diethylphosphinite, Z-chloroethyl di-u-naphthylphosphinite, dodecyl di-n-octylphosphinite, Z-chloropropyl dimethylphosphinite, 2 ethylhexyl bis(2 ethylhexyl)phosphinite, ethyl bis-(Z-methylcyclopentyl)phosphinite, methyl dibenzylphosphinite, etc.

When the aldehyde employed with the boron tr-ich'loride or boron tribromide and the triorgano phosphite is formaldehyde, products prepared according to the present process are either tris [(dialkoxyphosphinyl)methyl] or tris{[bis(haloalkoxy)phosphinyflmethyflbbrates, depending upon whether a trialkyl phosphite or a tris(haloalkyl) phosphite is employed. Thus, reaction of boron trichloride, formaldehyde and trimethyl phosphite gives tris[(dimethoxyphosphinyl)methyl] borate; and reaction of boron trichloride, formaldehyde and tris(2-chloroethyl) phosphite gives tris{[bis(haloalkoxy)phosphinyl]- methyl}borate.

Alkanecarboxaldehydes with boron trichloride and a trialkyl phosphite yield tris[l-(dialkoxyphosphinyl)alkyl] borates, i.c., compounds of the formula where Y and alk denote an alkyl radical of from 1 to 12 carbon atoms. Thus, reaction of boron trichloride with acetaldehyde and tri-n-butyl phosphite gives tris[l-(di-nbutoxyphosphinyl)ethyl] borate, Le, a compound of the above formula in which Y is methyl and alk is n-butyl.

' Other compounds of the aboveformula which are-prepared according to the present process. are, e.g.,

Tris 1- (dimet-hoxypho sphinyl) ethyl] borate Tris 1- (dimethoxyphosphinyl) undecyl] borate Tris 1- (di-n-octyloxyphosphinyl -2-methylpropyl] borate Tris 1- (diethoxyphosphinyl butyl] borate Tris 1- (di-n-butoxyphosphinyl) butyl] borate Tris l- (di-n-butoxyphosphinyl) hex-yl] borate Tris 1- (dimethoxyphosphinyl) -2-ethylhexyl] borate Tris 1- (di-n-hexyloxyphosphinyl) dode cyl] borate Tris 1- (didodecyloxyphosphinyl) propyl] borate Tris 1- (di-n-propoxyphosphinyl) heptyl] borate Tris{ 1- [bis( Z-ethylhexyloxy) phosphinyl] -2-methylp ropyl}borate Tris(haloalkyl) phosphites react with boron trichloride and an alkanecarboxaldchyde to give tris{1-[bis(haloalkoxy) phosphinyl]alkyl}borates. Thus, reaction of tris- (2-chloroethyl)phosphite with ,"propionaldehydc, and

boron trichloride givesttris{1-[bis(2-chloroeth0xy)phos phinyl]propyl}borate; tris(2 .-t chloropropyl)r pho'sphite,

boron trichloride and acetaldehydeyield tris{1-,[bis(2- chloropropoxy) phosphinyl] ethyl} borate; Itris(tetrachlorohexyl) phosphite, t boron trichloride and butyra'ldehyde give tris{1-[bisr(tetrachlorohexyloxy)phosphinyl]-. butyl}borate; tris(2-flu0roethyl) phosphite, 2-ethylhexanal-and boron trichloride give tris{l-[-bis(2- fluoroethoxy)phosphinyl] 2 Lethylhexyl}borate; trisidibromooctyl)phosphite, valeraldehyde and boron trichloride give tris {l-[bis(dibromooctyloxy)phosphinylJpentyl} boratepand tris(2-iodoethyl)phosphite, lauraldehydeand boron trichloride give tris{l [bis(2 iodoethoxy)phosphi'nyl]- dodecyl}borate.

Esters of hydrocarbylphosphonous. acids react .with boron trichloride and formaldehyde to give -tris[(alkoxyhydrocarbylphosphinyl)methyuborates, i.e., compounds of the formula B[OCHg-i%-OT]3 where A isa hydrocarbyl radical of from 1 to 12.carbon atoms which is free oft'ali-pha'tic unsaturation and T is selected from the class consisting of alky-Landhaloalkyl radicals of from 1 to 12.0arbon, atoms. vThus, reaction of boron trichloride with. formaldehyde and diethyl phenylphosphonite gives tris[(ethoxyphenylphosphinyl) methyl]-borate, i.e., a compound ofythe above formula in which A is phenyl and T is ethyl. Other compounds of the above formula which are preparedaccording to the invention from a hydrocarbylphosphonite, ,tformaldehyde and a boron trihalide are, e.g.,

Tris methoxypropylph osphinyl methyl bot-ate Tris[ (methoxy-a-naphthylphosphinyl)methyl] borate Tris (ethoxyhexylphosphinyl) methyHbora-te Tris[ (n-butoxycyclohexylphosphinyl) methyl1bora-te Tris (2-chlo-roethoxydode cylphosphinyl) methyl] bora-te Tris (2chloropropoxy-4-tolylphosphinyl)methyl] borate The phosphonites react with boron trichlorideand an alkanecarboxaldehyde to give tris[(a-lkoxyhydrocarbylphosphinybalkylybonates, depending upon whether an alkyl or haloalkyl ester of the hydrocarbylphosphonous acid is employed, i.e., compounds of the formula Where Y is an alkylradical of firom 1 to 12 carbon atoms, A is a hydrocarbyl radical of from-1 to :12 carbon atoms which is free of aliphatic unsaturation and T is selected from the class consisting of alkyl andha-loalkyl radicals @of firom 1' to 1'2 canbon'a toms. Thus, from diethyl phenylphosphonite, acetaldehyde and boron trichloride there, is obtained tn's[1 (ethoxyphenylphosphinyl)ethyl1borate, i.e., a compound of the above formula in which Y is methyl, A is phenyLand T issethyl. Other compounds of the above formula provided by the invention from boron trichloride or tribrornide, a hydrocarbylphosphoni-te and either an alkanecarboxalldehyde or a substitution product thereof are shown in the table below:

. The phosphinites 'reaot-with-boron trichloride orboron tribromide and formaldehyde to give compounds of the formula in which A and Af areghydrocarbyl-radicals :which; are free of aliphatic unsaturationand contain irom 1 to 12 carbonvvatoms. l-Thus, boron trichlonide, formaldehyde and ethyl 1. diphenylphosphinite give tris] (diphenylphosphinynmethyhboraite. Using an alkaneoarboxaldehyde instead of form-aldehyde, the products. are tris[ (dihydrocarby lphosphinyl)alkyl]borates, e.g., acetaldehyde, methyl di-n butylphosphinite and boron trichl-oride yield tris[1- di-n-rbutylpho sphinyl ethyl] borate.

..-Reaction of a dihalohydrocarbylborane with formalde- -l rhydesandva trialkyl phosphite or a tris(haloalkyl) phosphite yields bisL(dialkoxyphosphinyl)methyHhydrocarbon boronates when a tnialkyl phosphite is used or his{ [bis (haloalkoxy)phosphinyl]methyl} hydrocarbonboronates when :astris(haloalkyl) phosphite is used, i.e., compounds for the formula wherein R is a-hydrocanbyl radical and which conirtainstfrom 1 to 12 carbon atoms-and T is selected from r the classconsisting of alkyl and halogen-substituted alkyl radicals of froml to 12 carbon atoms. Thus, from di- ,wchloroethylborane, and-substantially two, males each of ,7 formaldehyde and of trimethyl phosphite there is obtained bis[-(dimethoxyphosphinyl)methyl]ethaneboronate, i.e., a

- compound oftheformula inwhich Risethyl and T is t' hyde and tris(2 -chloroethyl )phosphine there is obmethyl. 7 Similarly, from dichloroethyliborane, formaldetained bis{[bis(2 chloroethoxy) phosphinyl] methyl}ethaneboronate; andfrom cyclohexyldichloroborane, formal- I dehydeand tridodecylphosphite there is obtained bis[(didodecyloxyphosphinyl)methyl] cyclohexaneboronate.

Thereaction ofa dichlorohydrocarbylborane, an allganecarboxaldehyde and a trialkyl or tris(haloalkyl)phosphite -gives either bis[l (diallgoxyphosphinyl)alkyl]hydrocar- -bonboronate or bis{1-[bis(haloalkoxy)phosphinyl]alkyl} hydrocarbonboronates, depending upon whether a tn'alkyl 1 1 phosphite or a tris(haloalkyl) phosphite is used, i.e., the products thus otbained have the formula Y H Oi3HP-(O'l)z O-(FH-li-(OT);

where R and T are as defined above and Y is an alkyl radical of from 1 to 12 carbon atoms. Thus, the reaction product of dichloropentyl borane, acetaldehyde and tri-npropyl phosphite gives a compound in which R of the above formula is .pentyl, T is propyl and Y is methyl, i.e., bis[1 (dipropoxyphosphinyl)ethyH entanebQronate. Other compounds prepared according to the present process from a dichlorohydrocarbylborane, an alkanecar boxaldehyde and a trialkyl or tris(haloalkyl)phosphite are as follows:

Bis 1-( didodecyloxyphosphinyl) ethyl] biphenyllboronate Bis 1- (dimethoxyphosphinyl) propyl 1 benzeneboronate Bis l- (diethoxylpho sphinyl) ethyl] -a-naphtha1enehoronate Bis 1- (dieth oxyphosphinyl) -2-ethylhexyl] eth anehoronate v Bis{1- [bis(2- bromoethoxy) phosphinyi] undecylIi-ptolueneboronate Bis{ 1- [bis (Z-chloropropoxy) phosphinyl]buty1}-2- phenylethaneboronate Bis{ 1- [his (Z-ethyihexyloxy) phosphinyl ]propyl}propeneboron ate Bis{ 1- [his (2-iodoethoxy) phosphinyl] ethyl}benzeneboronate Bis l-(diethoxyphosphinyl ethyl] cyclohexaneboronate Bis{ 1- [his (2-chloroprop oxy) phosphinyl] -2-methylpropy1}-3 -butyneboronate Bis{ l-[ bis (Z-chloroethoxy) phosphinyl]butyl}butaneboronate Employing a henzenoid carboxaldehyde with the dichlorohydrocar-bylborane and a trialkyl phosphite yields the bis[1 (dialkoxyphosphinyl)aralkyl1hydrocarbonboronate, i.e., compounds of the formula in which R is a hydrocarbyl radical which contains from 1 to 12 carbon atoms, Bz denotes a benzenoid radical which is free of aliphatic unsaturation and contains from 6 to 12 carbon atoms and alk denotes an alkyl radical of from 1 to 12 carbon atoms. Thus, dichlorophenyl borane, benzaldehyde and trimethyl phosphite give bis[oc-(dimethoxyphosphinyl)benzyl] benzeneboronate; dichloro-n-propylborane, p-tolualdehyde and tris(2-chlor0ethyl)phosphite gives bis{a-[bis(2-chloroethoxy)phosphinyl] p methylbenzyl} n propaneboronate; dichlorocyclohexylborane, phenylacetaldehyde and triethyl phosphite gives bis[1-(di ethoxyphosphinyl) 2 phenylethyl] cyclohexaneboronate; dichloro-Z-pentenylborane, p-isopropyl'benzaldehyde, and tri-n-butyl phosp-hite gives his[m-(di-n-butoxyphosphinyl)- p-isopropylbenzyH-Z penteneboronate; dichloro 4 biphenylylborane, =benzaldehyde and tetrachlorododecyl phosphite gives bis{cc[bis(tetrachlorododecyloxy)phosphinyl]benzyl}-4-biphenylboronate; dichlorobenzylboran ,S-naphthaldehyde and triethyl phosphite gives bis[(diet-hoxyphosphinyl) (a naphthyl)methyl1phenylmethaneboronate; dichloro(4-pentylphenyl)borane, benzaldehyde and tris (2 bromoethyDphosphite gives biS{oz [bis(2- bromoethoxy)phosphinylJbenzyl} 4 pentylhenzeneboronate; dichlorophenylborane, o tolualdehyde, and tris(2-fluoroethy1)phosphite gives bis{u [bis(2 fluoroethoxy)phosphinyl] -o-methylbenzyl} 4 pentylbenzeneboronate, etc.

When employing as the dihalo boron component a dichlorohydrocarbyloxyborane and using as the aldehyde an alkanecarboxaldehyde, the products which are obtained with the trialkyl phosphites are bis[(dialkoxyphosphinyl) alkyl] hydrocarbyl borates, i.e., they have the structure wherein R is a hydrocanbyl radical of from 1 to 12 canbon atoms, and alk and T denote an alkyl radical of from 1 to 12 carbon atoms. An example thereof is bis[1-(diethoxyphosphinyhethyflethyl borate which is prepared from diohloroethoxyborane, acetaldehyde and triethyl phosphite. Variation of the dichloroethoxyborane to another dihalohydrocarbyloxyborane, of acetaldehyde to another alkane carboxaldehyde and of triethyl phosphite to another trialkyl phosphite or to a tris(haloalkyl) phosphite gives, for example, bis l- (diethoxyphosphinyl) propyl] phenyl borate; bis[l-(dibutoxyphosphinyl)hexyl] n butyl borate; bis[1-(methoxyethoxyphosphinyl(butyl1-p tolyl borate; bis[1 (2 chloroethoxymethoxyphosphinyl)octyl]allyl borate; bis[ 1- (didodecylphosphinyl)propyl1 n octyl borate; bis{l-[bis(2 ethylhexyloxy)phosphinyl]ethyl} phenyl borate; bis[1 (diethoxyphosphinyl)[ 2 ethyl hexyl1phenyl borate, etc.

When the dichloro boron compound is a dichlorohydrocarhyloxyborane, the aldehyde is a benzenoid aldehyde and the phosphite is a trialkyl phosphite, the products are biS[ez (dialkoxyphosphinyl)aralky11hydrocarbyl borates. Examples of compounds thus provided are bis[a-(diethoxyphosphinyl)benzyl]phenyl borate, which is prepared irom dichlorophenoxyborane, benzaldehyde and triethyl phosphite; bis oc- (dibutoxyphosphinyl benzyl] 2- propynyl borate; bis[1-(diisopropoxyphosphinyl)-2-phenylethyl1dodecyl borate; his{a-[2-ethylhexyloxy)phosphinyl] -p-ethylhenzyl}benzyl 'borate; and bis[1-(dimethoxyphosphinyl)-3-phenylethyl1-p-tolyl borate.

When the phosphite is a haloalkyl phosphite, the prod ucts obtained from a dichlorohydrocarbyloxyborane and an aromatic aldehyde are bis{1-[bis(haloalkoxyphosphinyl]aralkyl}hydrocarbyl borates, e.g., bis{1-[bis(2-ch1oroethoxy)phosphinyl]benzyl}pheny1 borate which is prepared according to the invention from dichlorophenoxyborane, benzaldehyde and tris(2-chloroethyl)phosphite.

As stated above, the dihalohydrocarhyloxyborane compound may have one or more halogen suhstituents in the organic portion of the molecule. Thus, according to the invention, there are prepared bis[l-(dimethoxyphosphinyl)ethyl1 0-, mor p-chlorophenyl borate from dichloro (0-, mor p-chlorophenoxy)borane, acetaldehyde and trimethyl phosphite; bis{a-[his(Z-chloroethoxy)phosphinyl] benzyl}dibromophenyl borate from (dibromophenoxy)dichloroborane, benzaldehyde and tris(2-chloroethyl)phosphite; bis[1 (di n-propoxyphosphinyl)-2-ethylhexyi]-4 (trifluoromethyl) phenyl borate from dichloro-4-(trifluoromethyDphenylborane, 2-ethylhexanal and tri-n-propyl phosphite; bis [e- (didodecyloxyphosphinyl) benzyl] -2-chloroethyl borate from dichloro(Z-chloroethoxyboraue), benzaldehyde and tridodecyl phosphite; bis[1-(di-n-hexyloxyphosphinyl)ethyl]octachlorobiphenylyl borate from dichloro(octachlorobiphenylyloxy)borane, acetaldehyde and tris-n-hexyl phosphite; bis[ (diethoxyphosphinyl)methyl]-3,3-dibromopropyl borate from dichloro(3,3-dibrorno propoxy)borane, formaldehyde and triethyl phosphite; bis{-[bis(2 chloropropoxy)phosphinyl] (o: naphthyl) 13 methyl}-2,5-dibromophenyl borate from dichloro(2,5-dibromophenoxy)borane,-a-naphthaldehyde and tris(2-chloropropyl) phosphite; bis 1- (diethoxyphosphinyl) ethyl] -3- chloropropenyl borate from dichloro(3-chloropropenyl) borane, acetaldehyde and triethyl phosphite; bisLl-(diamyloxyphosphinyl)-2-ethylhexyl]-4-iodobutyl borate from dichloro(4-iodobutoxy)borane, Z-ethylhexanal and triamyl phosphite.

When the dihalo boron reactant is a thio ester, the compounds prepared according to the present process are esters in which the -SH group is esterified with the organic residue of the boron compound used in the reaction and each of the OH groups by a (dialkoxyphosphinyl) hydrocarbyl or a [bis(haloalkyl)phosphinyHhydrocarbyl radical, i.e., they have the structural formula in which R' designates a hydrocarbyl radical of from 1 to 12 carbon atoms which may or may not be halogensubstituted, R" designates hydrogen or a hydrocarbyl radical of from 1 to 12 carbon atoms, T is an alkyl radical, and in which both R and R" are free of aliphatic unsaturation, The reaction of tdichloro(phenylthio)borane, formaldehyde and trimethyl phosphite gives bis[(dimethoxyphosphinyl)methyl] -S-phenyl thioborate, i.e., a compound of the above formula in which R is phenyl, R is hydrogen and T is methyl; and reaction of dichloro (ethylthio)borane, benzaldehyde and tris(2-chloroethyl)phosphite gives bis{a- [bis(2-chloroethoxy)phosphinyl]benzyl}-S-ethylthioborate, i.e., a compound of the above formula in which R is ethyl, R" is phenyl and T is 2- 'chloroethyl. Examples of other compounds of the above formula which are prepared by the present process are shown in the table below:

As hereinbefore stated, the dihalohydrocarbylboranes, the dihalohydrocarbyloxyboranes and the dihalo(hydrocarbylthio)boranes react with a variety of aldehydes and a variety of triorgano phosphites. There are thus obtained phosphinyl boron compounds of the formula where R is derived from the RBCl or RBBr compound, A from the aldehyde ACHO, and T from the phosphite P(OT') Thus, for example, the following compounds of the above formula are thus provided:

R A T 4-ehloropheny1 4-tolyl ethyl a-naphthyl 2chlor0ethy1 methyl biphenylyl 4-methoxybutyl n-butyl 2-tolyl 3-carboeth0xypropyl n-pentyl benzyl Z-Iuryl 2chloroethyl 2-chl0roethyl 3-cyanopropyl 2-chloropropyl dodecyl 2,3-dichloropropy1 n-dodecyl phenyl e-fiuorobutyl n-oetyl octachlorobiphenylyl lodomethyl j Z-ethylhexyl allyl benzyl trichloropropyl iodophenyl S-methoxyheptyl n-propyl 2-phenylethyl 2-thienyl n-butyl triehloropropyl 4-ethylphenyl ethyl n-oetyl methylenedioxaphenyl sec-pentyl cyel ohexenyl 4-cyanophenyl ethyl pentyl 4-carboethoxyphenyl ethyl 4-buty1phenyl 2-ehloro-4-tolyl methyl 2,4-diehl0r0phenyl Z-furyl 2-ethylhexyl -(trifiuoromethyhphenyl benzyl methyl ethoxy 4-methoxyphenyl n-heptyl ethylthlo Zcyanobenzyl 2-chloroethy1 phenylthio 3-carbobutoxyethyl tetrachlorobutyl 2-chloroethoxy 2-chloroA-tolyl isopropyl 2-chloropropoxy, 5-methyl-24uryl sec-butyl (2-chloroethyl)thio 5-methoxy-2-thieny1 n-octyl a-naphthylthio trichlorobutyl sec-dodecyl I 2-propynyloxy pentachlorophenyl n-pentyl tert-dodeeylthio phenyl 2-chloropr0pyl benzylthio u-naphthy-l ethyl 2,4-dibromobenzylthio biphenylyl n-propyl methyl 4-ethylphenyl sec-nonyl Z-ethylhexyl 2,4-dichlorobenzyl methy 4-hexylphenyl fl'methoxyfl-naphthyl ethyl cyclopentyl trichloromethyl methy l Ketones react with the dihalo boron compounds and the triorgano phosphites as follows:

in which R is selected from the class consisting of hydrocarbyl-, halohydrocarbyl-, hydrocarbyloXy-, halohydrocarbyloxy-, hydrocarbylthioand halohydrocarbylthioradicals wherein the hydrocarbyl group has from 1 to 12 carbon atoms, X is chlorine or bromine, Y is one of the radicals: alkyl of 1 to 12 carbon atoms, benzenoid of 6 to 11 carbon atoms, furyl or thienyl or said radicals carrying a substituent selected from the class consisting of halogen, cyano, methylenedioxy, alkyl, O-alkyl and -COOalkyl wherein the alkyl radical has from 1 to 5 carbon atoms, Z is an alkyl radical of from 1 to 3 carbon atoms, and Z and Y together complete a cycloalkane ring having from 5 to 6 carbon atoms in the ring and a total of from 5 to 10 carbon atoms; and T is selected from the class consisting of alkyl and haloalkyl radicals of from 1 to 12 carbon atoms. There are thus obtained, e.g., the following:

Bis [2- (dimethoxywphosphinyl propyl] ethyl borate from dichloroethoxyborane, acetone and trimethyl phosphite.

Bis[2-(diethoxyphosphinyl)butyl]-S-phenyl thioborate from dichlorophenylthioborane, Z-butanone and triethyl phosphite.

BiS{oc [bis( 2 chloroethoxy)phosphinyl]-a-methylbenzyl}-4-chlorophenyl borate from dibromo-(4-chlorophenoxy)borane, acetophenone and tris(2-chloroethyl)phosphite.

Bis[u (di-n-butoxyphosphinyl)-a-methylfurfuryl]-S- Z-chloroethyl thioborate from dichloro-(Z-chloroethylthio)borane, 2-furyl methyl ketone and tri-n-butyl phosphite.

Bis[2 (didodecyloxyphosphinyl) 5-ethoxy)pentyl]- 2-propynyl borate from dichloro-(2-propynyloxy)borane, S-ethoxy-Z-pentanone and tridodecyl phosphite.

Bis[3 (d iethoxyphosphinyl)pentyl]benzeneboronate from dichlorophenylborane, 3-pentanone and triethyl phosphite.

Bis{2 [bis(2 chloroethoxy)phosphinyl]tetradecyl}- 4-penteneboronate from dibromo-4-pentenylborane, 2-tetradecanone and tris-(Z-chloropropyl)phosphite.

15 Bis[3 (di n l butoxyphosphinyl)-7-ch1oroheptyl] cyclohexaneboronate from dichlorocyclohexylborane, 7- chloro-Z-heptanone and tri-n-butyl phosphite. The alkyl or chloroalkyl esters of hydrocarbylphosphonites or of dihydrocarbylphosphinites can be used instead of the phosphites in the reaction with the dihalo boron compound and the carbonyl compound. Use of the hydrocarbylphosphonites gives compounds of the formula in which R, Z, Y and T are as defined above and A is a hydrocarbyl radical which is free of aliphatic unsaturation and contains from 1 to 12 carbon atoms. Thus, reaction of dichloroethylborane, acetaldehyde and dimethyl phenylphosphonite gives bis[l-(methoxyphenylphosphinyl)ethyllethaneboronate, ie, a compound in which R of the above formula is ethyl, Z is hydrogen, Y is methyl, A is phenyl and T is methyl. Similarly, reaction of dichloro(phenylthio)borane, acetone, and diethoxy propylphosphonite gives bis[2-(ethoxypropylphosphiny1)propyl]-S-phenyl thioborate, i.e., a compound of the above formula in which R is the phenylthio radical, Z and Y are both methyl, A is propyl and T is ethyl.

With the dihydrocarbylphosphinites, the products have the formula Z 8 a so] Y A. 2

wherein R, Z, Y and A are as above defined and A, like A, is a hydrocarbyl radical which is free of aliphatic unsaturation and which contains from 1 to 12 carbon atoms. From dichlorobutylborane, benzaldehyde and ethyl dibutylphosphinite there is obtained bislja-(dibutylphosphinyl)benzyl]butylboronate, i.e., a compound of the above formula in which R is butyl, Z is hydrogen, Y is phenyl, and A and A are butyl; and from dibromo (chlorophenoxy)borane, propionaldehyde and methyl dibenzylphosphinite there is obtained bis[l-(dibenzylphosphinyl) butyl] chlorophenyl borate.

When there' is employed as the halogen-containing boron compound a halodihydrocarbyloxyborane or a halobis(halohydrocarbyloxy)borane, the products prepared according to the present process have the formula where R is a hydrocarbon radical of from 1 to 12 carbon atoms or such a radical carrying halogen substitution, Y is selected from the class of hydrogen and hydrocarbyl radicals which are free of aliphatic unsaturation and which contain from 1 to 12 carbon'atoms and T is an .alkyl or haloalkyl radical of from 1 to 12 carbon atoms, i.e., the compounds are dihydrocarbyl, bis(halohydrocarbyl) or hydrocarbyl halohydrocarbyl l-[dialkoxyor bis (haloalkoxy phosphinyl] hydrocarbyl borates.

When the boron compound is a halobis(hydrocarbyl- .thio)borane or a halobis(halohydrocarbylthio)borane, .the products have the formula wherein R, Y and T areas defined above, i.e., the compounds are S,S-dihydrocarbyl, S,S-bis(halohydrocarbyl), S-hydrocarbyl S-halohydrocarbyl l-[dialkoxyor his (haloalkoxy)phosphinyl]hydrocarbyl dithioboratcs.

Similarly, when the boron halide is halohydrocarbyloxy (hydrocarbylthio)boraue or a compound in which one or both of the hydrocarbyl radicals carry halogen substitution, the products have the formula wherein R, Y and T are as herein defined, i.e., they are O-hydrocarbyl S-hydrocarbyl l-[dialkoxyor bis(halo+ alkoxy) phosphinyl1hydrocarbyl thioborates where the O- and/ or the S-hydrocarbyl radicals may or may not be halogen-substituted.

When the halogen-containing boron compound is a halodihydrocarbylborane wherein one or both of the hydrocarbyl radicals may or may not be halogen-substituted, the products are l-(dialkoxyphosphinyl)alkyl dihydrocarbylborinates wherein halogen substitution may or may not be present in the alkoxy and/or the hydrocarbyl radical, i.e., they have the formula i ll B0CE-P(0T)g R 4:

wherein R, Y and T are as defined above.

When the boron compound is a halohydrocarbylhydro carbyloxyborane or a halogen-substitution product thereof, the presently provided compounds have the formula Ii.O1l3--OCH-P (OT)1 in which R, Y and T are as defined above, i.e., they are l-(dialkoxyphosphinyl)alkyl hydrocarbylboronates wherein the alkoxy and/or the hydrocarbyl radicals may or may not carry halogen substitution.

When the halogenated boron compound is a halohydrocarbyl(hydrocarbylthio)borane or a halogen substitution product thereof, the presently provided compounds have the formula 6 RS-][3O('3HP(OT)2 a Y in which R, Yand T are as herein defined, i.e., they are 1-(dialkoxyphosphinyDakyl S-hydrocarbyl hydrocarbylboronates or halogen substitution products thereof.

An example of a compound of the formula RO 0 ll /BO-()HP(OT)1 RO Y which is provided according to the present process is dibutyl l-(diethoxyphosphinyl)methyl borate, i.e., it is a compound in which R of the above formula is the butyl radical, Y is hydrogen, and T is the ethyl radical. It is prepared from dibutoxychloroborane, formaldehyde and triethyl phosphite. tx-[bis(ChloroethoXy)phosphinyl] benzyl bis(chlorophenyl)borate, i.e., a compound of the above formula in which R is a 4-chlorophenyl radical, Y is the phenyl radical, and T is the 2-chloroethyl radical, is prepared from chlorobis(4-chlorophenoxy)borane, benzaldehyde and tris (2-chloroethyl)phosphite. Other compounds of this formula prepared according to the invention are, for example:

Diethyl 1-(diethoxyphosphinyl)ethyl borate Diphenyl 1-[bis(2-ethylhexyloxy)phosphinyl]-2- ethylhexyl borate Bis(4-chlorophenyl)-ot-[bis(2-chloroethoxy)phosphinyl] benzyl borate Di-a-naphthyl 1-(dibutoxyphosphinyDpropyl borate Dibiphenylyl 1-(dimethoxyphosphinyl)butyl borate Bis(2-chloroethyl) 1-(didecyloxyphosphinyl)ethyl borate Bis(pentachlorophenyl) l-(dinonyloxyphosphinyl)-2- methylpropyl borate An example of a compoundof the formula RS Y prepared according to the present process is the 8,5- diphenyl -l-(diethoxyphosphinyl)methyl dithioborate, i.e., it is a compound in which R is the phenyl radical, Y is hydrogen, and both Ts areethyl radicals. It is prepared according to the invention from chlorobis(phenylthio) borane, formaldehyde, and triethyl phosphite. Another compound of the above formula which is prepared according to the invention is the S,S-diethy1 l-[bis(2-chlo'ropropoxyphosphinyl)ethyl]borate, i.e., it is a compound in which R of the above formula is the ethyl radical, Y

.is the methyl radical and both Ts are 2-chloropropyl radicals. It is prepared from chloro-bis(ethylthio)- borane, acetaldehyde and tris'(Z-chloropropyl)phosphite. Other compounds of the above formula provided by the invention are conveniently set forth in the table'belowi R Y T phenyl ethyl methyl dodecyl n-butyl n-butyl entachlorophenyl phenyl' 2-chloroethyl Eenzyl 2-ethylpentyl dodecyl propenyl methyl n-hexyl p-tolyl nonyl 2-fluoroethyl B-naphthyl Q-methylpropyl n-octyl 2-chloroethyl ethyl ethyl -iodobutyl a-naphthyl 2-i0doethyl 2,4dichlorobenzyl methyl decyl 4-(trifluoromethyl)phenyl ethyl n-propyl octachlorobiphenylyl phenyl methyl Compounds of the formula RS H \BO(IJHIP(OT): RO Y prepared according to the present process are, e.g., the O-phenyl S phenyl l-(dibutoxyphosphinyl)methyl thioborate (R"=phenyl, T=-buty'land Y=H) which is prepared from chlo-rophenyl(phenylthio)borane, formaldehyde and tri-n-ibutyl phosphite; the O-ethyl S-ethyl l-[bis (Z-chloroethoxy)phosphinyl]propyl thioborate'which is prepared from chloroethyl(ethylthio)borane, propionaldehyde and tris(2-chloroethyl)phosphite; and the O butyl S 2,4 dichlorophenyl a [bis(3 bromopropoxyjbenzyl borate which is prepared from buty1chloro(2,4- dichlorophenylthio)borane, benzaldehyde and tris(3- bromopropy-Dphosphite.

Compounds of the formula R, It

B( JHP(0T R Y prepared according to the present process are, e.'g., the (diethoxyphosphinyl)methyl diphenylborinate which is obtained from chlorodiphenylborane,"formaldehyde and triethyl phosphite; 1-[bis(2-ethylhexyloxy)pho-sphinyl] propyl diethylborinate which is obtained from chl'orodi- 1-8 ethylborane, propionaldehy'de and tris(2-ethylhexyl) phdsphite; the 0: ['bis (2' chloroethoxy)phosphinyl] benzyl 4'-chlo'r'ophenyl u naphthylbo-rinate which is obtainedfrom' ch1oro(4 chlorophenyl) t f naphthylborarie, benz a-ldehyde and tris (Z-chloroethyDphoSphite; and the (didodecyloxyphosphinyl) a naphthyhnethyl dioctyl-borinate" which is obtained from chlorodioctylborane, a-riap hth'aldehyde and tridode'cylphosphite.

Examples of compounds of the formula O-]3O-(l3Hi (OT)r R Y provided by the invention are the phenyl'(diinetho'xyphosphinyDmethylp chlorobenzylboronate which is obtained from chloro(p chlorophenyl)phenoxyborane, formaldehyde and trimethyl phosphite; the ethyl l-[bis- (2 fiuoroethoxy')phosphinyl] 2 phenylethyl fl-napththaleneboronate which is prepared from chloroethoxy-flnaphthylborane, phenylacetaldehyde and tris(2-flu0'roethyl )pho sphite; and the trichloropropyl l-[bis 2j-butyloctyloxy)phosphinyl]propyl butaneboronate which is prepared from butylchloro(trichloropropoxy)borane, propionaldehyde and tris(2 butyloctyl)phosphite.

Compounds of the formula ll R'-s-13o-(I3HP(OT),

R Y prepared according to the present process are, e.g the S p bromophenytl (diisopropoxyphosphinyl)methyl ben zenethioboronatewhich is prepared from (p-bromophenylthio)chlorophenylborane, formaldehyde and triisopropyl phosphite; the S-ethyl ot-[bis(chloroethoxy)phosphin-" yl] 'b'enzyl biphenylthioboronate which is prepared from biphenylylchloro(ethylthio)borane, benzaldehyde and tris (2-chloroethyl)phosphite; and the S-propenyl 1 -(din hexyloxyphosphinyl)butyl dodecanet'hioboronate which is prepared from chlorododecyl(propenylthio)borane, butyraldehyde and tri-n-hexyl phosphite.

A particularly valuable class of compounds provided by the invention are the bistchloroalkyl) 1-[bis(ha-loalkoxy)phosphinyl]alky1'borates, i.e., compounds of the formula a) a oa kyl)B0 ?HP-( aloalkyl) alk (Hydrooar byl BX (Hydro carbyloxy) BX (Hydrocanby1thio) BX Hydrocarbyl(hyd'ro carbyloxy) BX Hydrocarbyl (hydrocarlbylthio) BX Hydrocarbyloxy (hydrocarbylthio) BX or compounds in which the hydrocarbyl radical is halogen substituted. The compounds thus obtained have the general formula Bis 1- (dihexyloxyphosphinyl ethoxy] di-n-butylaminoborane Bis{ 1- [bis (2-bromoethoxy) phosphinyl] dodecyloxy}ethylpentylaminob orane 1 Bis{ 1- [bis 2-ethylhexyloxy phosphinyl] propoxy} diisopentylaminoborane Bis{ 1- [bis 2-chloropropoxy phosphinyl] butoxy}di-npentylaminoborane Bis{ 1- [bis 2-iodoethoxy) phosphinyl] ethoXy} dimethylaminoborane Bis 1- (diethoxyphosphinyl) ethoxy] dimethylaminoborane Bis{ 1- [bis (Z-chloroprop oxy phosphinyl] -2-methylpropoxy} di-n-propylaminob orane Bis{ 1- [bis (2-chloroethoxy phosphinyl] butoxy} dibutylaminoborane Employing a benzenoid carboxaldehyde with the dialkylaminodihaloborane and a trialkyl phosphite yields the bis 1- (dialkoxyphosphinyl) aralkyloxy]dialkylaminoboranes, i.e., compounds of the formula in which A and A are the alkyl radicals defined above, Bz denotes a benzenoid radical free of aliphatic unsaturation and containing from 6 to 11 carbon atoms and alk denotes an alkyl radical of from 1 to 12 carbon atoms. Thus, dichloromethylpropylaminoborane, benzaldehyde and trimethyl phosphite give bis[a-(dimethoxyphosphinyl)benzyloxy]methylpropylaminoborane; dichlorodi npropylaminoborane, p-tolualdehyde and tris(2 chloroethyl) phosphite give biS{oc-[biS(2 chloroethoxy)phosphinyl] p methylbenzyloxy}di n propylaminoborane; dibromodimethylaminoboranc, phenylacetaldehyde and triethyl phosphite give bis[1 (diethoxyphosphinyl)- 2 phenylethoxy]dimethylaminoborane; dichlorodiethylarninoborane, o-tolualdehyde and tri-n-butyl phosphite give biS[oz-(di n butoxyphosphinyl) o methylbenzyl- Xy]diethylaminoborane; dichloroethylpropylaminoborane, benzaldehyde and tetrachlorododecyl phosphite give bis[a diethoxyphosphinyl) p ethylbenzyloxy]dipentyloxy}ethylpropylaminoborane; dichlorodipentylaminoborane, p-ethylbenzaldehyde and triethyl phosphite give biS[oc diethoxyphosphinyl) p ethylbenzyloxy1dipentylaminoborane; dibromodibutylaminoborane, benzaldehyde and tris(2-bromoethyl)phosphite give bis{a [bis (2- bromoethoxy) phosphinyl] benzyloxy} dibutylaminoborane; dichlorodimethylaminoborane, o-tolualdehyde and tris(2 fluoroethyl)phosphite give biS{a [bis(2-fiuoroethoxy)phosphinyl] o methylbenzyloxy}dimethylaminoborane, etc.

When the nitrogeneous dihaloborane compound is an N-heterocyclic borane, e.g., diohloropiperidino or pyrrolidinoborane, the products with formaldehyde and the triorgano phosphite are bis[dialkoxyphosphinyl)methyl] or bis{bis(haloalkoxy)phosphinyl]methoxy}piperdinoor pyrrolidinoboranes, i.e., compounds of the formula II OCHr-P-(OT):

OCHz-IT-(OT):

in which n is an integer of 2 or 3 and T is selected from the class consisting of alkyl and haloalkyl radicals of from 1 to 12 carbon atoms. Thus, dichloropiperidinochloroethyl)phosphite yield either the bis[(diethoxyphosphinyl)methoxy] or the bis{[bis(2-chloroethoxy)phosphinyl]methoxy}piperidinoborane; and dichloropyrrolidinoborane, formaldehyde and tri-n-octylphosphite or borane, formaldehyde and triethyl phosphite or tris(2- 24 tris(2-ch1oropropyl)phosphite give either the bis[(di-noctyloxyphosphinyl)methoxy] or the bis{[bis(2-chloropropoxy)'phosphinyl]-methoxy}pyrrolidinoborane. Other dihalo-N-heterocyclic boranes, e.g., -aziridino-, Z-methylaziridino-, azetidino-, or morpholinodichloroor dibromoboranes react in the same manner.

Employing a hydrocarbon carboxaldehyde with the triorgano phosphite and N-heterocyclic boron dihalide in the present process there are obtained with the aziridino-, azetidino-, pyrrolidino-, or piperidinodihaloboranes wherein n is an integer of 0 to 3, Y is a hydrocarbyl radical which is free of aliphatic unsaturation and contains from 1 to 12 carbon atoms, and T is selected from the class consisting of alkyl and haloalkyl radicals of from 1 to 12 carbon atoms, i.e., there are provided either the bis[1-(dialkoxyphosphinyl)hydrocarbyloxy) or the bis{1 [bis (haloalkoxy)phosphinyl]hydrocarbyloxy}piperidinoboranes, or pyrrolidinoboranes, or azetidinoboranes, or aziridinoboranes. Thus the reaction of dichloropiperidinoborane, acetaldehyde and triethyl phosphite gives bis[1 (diethoxyphosphinyl)ethoxy]piperidinoborane; dibromoaziridinoborane, benzaldehyde and triisooctyl phosphite give bis[a (diisooctyloxyphosphinyl) benzyloxy] aziridinoborane; tris (2 chloroethyl) phosphite, butyraldehyde and dichloroazetidinoborane give bis{1 [bis(2 chloroethoxy)-phosphinyl]butoxy}azetidinoborane; trimethyl phosphite, octanal and dichloropyrrolidinoborane give bis[1 (dimethoxyphosphinyl) octyloxy]pyrrolidinoborane; tri-n-butyl phosphite, p-tolualdehyde and dichloropyrrolidinoborane give biS[oc-(din butoxyphosphinyl) p methyibenzyloxy]pyrrolidinobor-ane; and tris(2 ohloroethyl)phosphite, acetaldehyde and diohloro-2-methylaziridinoborane give bis{1-[bis(2- chloroethoxy) phosphinyflethoxy} aziridinoborane.

When the boron compound is a morpholinodihaloborane the products prepared according to the invention from a hydrocarbon carboxaldehyde and a triorgano phosphite such as a trialkyl phosphite are bis[1dialkoxyphosphinyl)alkoxy1morpholinoboranes of the formula wherein Y is a hydrocarbon radical free of aliphatic unsaturation and containing from 1 to 11 carbon atoms and T is an alkyl radical of from 1 to 12 carbon atoms. Thus, the reaction of dichloromorpholinoborane with acetaldehyde and triethyl phosphite gives bis[1-(diethoxyphos phinyl)ethoxy] morpholinobonane; with benzaldehyde and tributyl phosphite said dichloro compound gives bis[ x- (dibutoxyphosphinyl benzyloXy] morpholinoborane.

'Ihe nitrogenous boron compounds react with a carbonyl compound and a phosphonite or a phosphinite instead of a phosphite. Thus, reaction of dichloropiperidinoborane, acetaldehyde and diethyl phenylphosphonite gives bis[1 (ethoxyphenylphosphinyl)ethoxy]piperidinophosphite gives 2 {a [bis(2 chloroethoxy)phosphiny1] benzyloxy}-l,3,2-dioxaborinane:

22 Nitrogenous boron halides are likewise very useful in the present process.

Reaction of dialkylaminodihaloboranes with formaldehyde and a trialkyl phosphite or a tris(haloalkyl)phosphite yields dialkylamino bis[(dialkoXyphosphinyDmeth- 5 u 1 m oxyjboranes when a tnallryl phosphite is used or dlalkyl- CH2 CH3 amino bis{[bis(haloalkoxy)phosphinyl}methoxy}boranes when a tris(haloalkyl)phosphite is used, i.e., compounds 11; of the formula With Z-bromoor Z-chloro-l,3,2-dioxyborepane, acetone and trimethyl phosphite, the product is Z-{Z-(dir'nethoxy- A phosphinyl)propoxy1-l,3,2-dioxaborepane: V /B OCH-P(OCHQ)B OCHg-I(OT); 0 0 CH3 0 (3E 5H2 wherein A and A are 'alkyl radicals of from 1 to 5 car- H2 oon atoms, and T is selected from the class consisting of alkyl and halogen-substituted alkyl radicals offrorn 1 to Usmg the 'appmpnatei halogenatgd dlox'a ring compound 29 12 carbon atoms. Thus, from dichlor'omethylpropylof appropriate cgmPound and the aminoborane and substantially two moles each of formalappmpnatfi t.n0rganOph9Sph1teth? follolvmg compounds dehyde and of trimethyl phosphite there is obtained his 'abtzfmed accnrdmg to the liwentmn: [(dimethoxyphosphinyl)rnethoxy]methylpropylaminobo- 5 g n hexylexyphosphmynmethoxy] rane, i.e., a compound of the formula in which A is loxa om i methyl, A is propyl and T is methyl. Similarly, from :I g t f g g f g9 f i dlchlombenzyl' dichlorodiethylaminobcrane, formaldehyde and tris(2- My} Y 7 7 m chloroethyl) phosphite there is obtained bis{[bis(2-cl1lo- {Op yloxyp hosp hmyl) pentyloxy] drbutyl' roethoxy) ohosphinylllmethoxy} diethylaminobrane. f gf i ga I h 1) d d ,1 4 thl The reaction of a dialkylaminodihaloborane with an 1 3 f E y OX3? ospnny O 0X31] e j alkanecarboxaldehyde and a trialkyl or tri s(haloalkyl) loxa g f i i 1 hi Df f 1 4 5 phosphit'e'gives either bisll-(dialkoxyphosphinyl)alkoxy] g g 'f g gg gggggii my ur my Oxy] dialkylarninoboranes or bis{1-[bis-(haloalkoxy)phosphini I yl]alkoxy}dialkylaminoboranes, depending upon W ether 1 gggigfigigg gg mcnlomethoxy] 5 a trialkylphosphite or a tris (haloalkyl) phosphi'te is used,

Instead of using ph-osphites in the reaction 'with the the products thus obtamed have the formula mono-halo boron compound and the carbonyl compound, Y 0 there may be employed esters of hydrocarbylphosphonous A I acids or esters of dihydr-ocarhylphosphinous acids. Thus, 2 the reaction of ch'lorodi-butyl borane, acetaldehyde and /NB\ dirnethyl propylphosphonite gives l-(methoxypropylphosphinyhethyl dibutyl borinate, i.e., i ll 0 (OHzCHzCHzCEz)zB-OC1Eli0CH Where A and Anare alkyl iradfiicals of from 1 K25 carbon 7 atoms, Y is an a y radica o from 1 to 12 car on atoms Cm CEZCHzCH: and T is an alkyl radical or haloalkyl radical of from I Reaction of brornodiethoxyborane, Z-butanone and ethyl to 12 Carbon atoms Thus the reaction product of diljhenylphosllhmlte gives methyl z'mlphenylphosphmyl) chloroethylpentylaminoborane, acetaldehyde and tri-nbmyl bomte propyl phosphite gives a compound in which A of the (H13 g above formula is ethyl, A is pentyl, Y is methyl and T (CH=OI-I2O)zBO-CP is propyl, ire, bis[1-(dipropoxyphosphinyl)ethoxy]ethyl- CH2CH3\C2H pentylaminoborane. Other compounds prepared accordn a ing to the present process from a dialkylaminodichloro- The compqunds generallylobtamed fliefnoriwhalo borane or a dialkylaminodibromoborane, an alkanecarbomns by ushng the phosphomtes or phosphmltes Instead boxaldehyde and a trialkyl or tris(haloalkyl) phosphite of the phosphites have the general formula are as follows:

5 11 H BisI1-(dimethoxyphosphinyl)propoxy]dimethylaminoborane V R Y A Bis'[l-(diethoxyphosphinyl)ethoxy]diethylaminoborane Further examples of such compounds are given in the GO Bis[l-(diethoxyphosphinyl)-2-ethylhexyloxy]methylprotable below: pylarninoborane R1, R7! Z i Y A! All i 1 th 1 an fiiiiglrh l E p li nyl lugs int}? allyl H ethyl phenyl 2chloroethoxy p-tolylthio cyclohexyl propyl n-octyl eyclohexyl H methyl cyclohexyl ethoxy phenoxy H methyl phenyl methoxy 2-chl0r0ethyl H phenyl p-tolyl p-tolyl 2 chlorolvinyl H Elwyanopropyl bonzyl dodecyl benzyl methyl heptyl pentyl deeyloxy 2-propy-ny1 propyl dodeeyl hexyl ethyl p-ethylphenyl H a-naphthyl ethyl butoxy dndeeyl methyl 2-ethoxybutyl phenyl phenyl ethoxy H piperonyl isopropyl methoxy dichlorcphenyl H carbomethoxypropyl phenyl phenyl aldehyde.

25 tone and methyl diethylphosphinite gives bis[2-(diethyl phosphinyl propoxy] dimethylaminoborane:

reactants is usually recommended in order to obtain smooth reaction. However, as will be apparent to those skilled in the art, the exothermal nature of the reaction becomes less of a factor as the molecular weight of the reactants, and particularly of'the triorgano phosphorous ester, is increased. Also, When the aldehyde is either a higher alkanecarboxaldehyde or an aralkyl or alkaryl aldehyde, reaction is generally not so rapid as it is with the lower aliphatic aldehydes or' with benzaldehyde. It is thus recommended that in each initial run, the three reactants be mixed gradually at low temperatures and that external heating be employed only when there appears no spontaneous increase in temperature as a consequence of the mixing. In most instances, the reactionis mildly exothermic initially. Whether the reaction goes to completion without the use of extraneous heat is determined by the nature of the reactants. Completion of the reac 'tion, in any event, can be readily ascertained by noting cessation in change of viscosity, refractive index, or the quantity of by-product alkyl or haloalkyl halide. Using the lower alkanecarboxaldehydes, which aldehydes are generally very reactive, external cooling is usually advan tageous. When working with such active aldehydes, optimum conditions comprise gradual addition of the haloboron compound to a mixture of the other two reactants with application of external cooling and thorough stirring. Usually it sufiices to maintain the reaction temperature at, say, from '25 C. to 50 C. during addition of the When all of the aldehyde has been added to said mixture and there is no longer any evidence of exothermic reaction, completion of thereaction may be assured by heating the reaction mixture to a temperature of from say, 50 C. to 150 C. With the rnore sluggish aldehydes, it may be necessary to heat the reaction mixture moderately before an exothermic reaction is initiated. Employing a' high molecular weight phosphorus ester and halo-boron compound, even higher temperatures maybe required.

The reactants are advantageously employed in stoichiometric proportions( i.e., one mole of the halo-boron com- 'pound and substantially one mole each of the carbonylic compound and of the triorgano' phosphorous ester per halogen atom present in said halo-boron compound.

Thus with a boron compound such as boron trichloride "stoichiomet'ricproportions are advantageously employed in that thereby-good yields of desired product result and there arises substantially no problem of separating any excess reactant or reactants, the carbonyl compound and the phosphorus ester may be present in excess with respect to said boron halogen compound. 7 i

Formation of the desired product, i.e., the phosphinyl boron compound, is accompanied by the formation of a halogenated alkane as aby-product. Thus, the reaction of, say, diaryloxychloroborane, acetaldehyde and triethyl phosphite gives ethyl chloride as a by-product:

The lay-product halogenated alkane thus consists of one of the alkyl or haloalkyl radicals of the trialkyl or tris(haloalkyl)phosphite used plus the halogen atom present in the initially employed halo-boron compound. This by-product is readily removed from the desired product by volatilization. The'by-product halogenated 'alkanes are generally articles of commerce for whichmany applications exist. Also, for many purposes asolution of the phosphinyl boron compound in the haloalkane may be used directly for a variety of industrial and agricultural applications, e.g., as a gasoline additive or a nematocide.

The process of'the present invention is readily con ducted in the absence ofan inert diluent or catalyst. However, catalysts and diluents or solvents may be employed. The-use of diluents may be particularly advantageous when working with the high active aldehydes; such diluents may be, e.g., benzene, toluene, dioxane, methylene chloride, or hexane. Although no particular order of adding the reactants to each other 'need be observed, the reaction is preferably carried out by adding the boron rialide reactant to' a solution of the carbonyl compound and the trivalent phosphorus ester. However, the reaction may also be conducted, e;g., inthe case of the a-halocarbonyl compounds','by mixing the halo-boron compoundwith the carbonyl compound at a low temperature, and then adding the phosphorus ester. Advantageously, when using boron 'trichloride or boron tribromide as the boron component, the activity thereof may be moderated by first preparing an ether complex thereof and employing said complex instead of the trihalide. The ether complexes are formed-by simply passing the trihalide into an excess of anhydrousether, whereby there is forrned an ether solution "of the complex. Said solution, without isolation'of the complex, can then be added to a mixture of the carbonyl compound and'the trivalent phosphorus ester. As example'of others which are useful for this purpose are ethyl or propyl ether, dioxane, tetrahydrofuran, etc. 7

An alternative method for the preparation of the present compounds comprises reaction of a halogenated boron compound with an ester'of an a-hydroxyphosphonic' acid. Thus, reaction of, say, an alkoxydih'alob'orane with such an ester proceeds as follows:

Reaction with a boron trihalide results in similar re placement of three, rather than two, halogen atoms; and in the'case of a mono-haloboron compound there is, of course, replacement of only the one'halo gen' atom. The boron halide may be boron trichloride or tribromide, or a compound of the formula" RBX or R 'BX where X is chlorine or bromine and Ris selected from the class consisting of hydrocarbyl, halohydrocarbyl, hydrocarbyloxy, hydrocarbylthio, halohydrocarbyloxy, and halohydro'carbylthio radicals of from 1 to 12 carbon atoms. The

27 hydroxy phosphonate may be any compound of the general formula wherein Y is selected from the class consisting of hydrogen and the radicals: alkyl of from 1 to 12 carbon atoms, furyl, thienyl and benzenoid hydrocarbon which are free of aliphatic unsaturation and contain from 6 to 12 carbon atoms; and said radicals carrying a substituent selected from the class consisting of halogen, cyano, methylenedioxy, alkyl, --O-alkyl, and COO-alkyl where the alkyl radical has from 1 to carbon atoms; Z is selected from the class consisting of hydrogen and alkyl radicals of from 1 to 3 carbon atoms; and T is selected from the class consisting of alkyl and haloalkyl radicals of from 1 to 12 carbon atoms.

While, as will be seen from Examples 3 and 5 hereinafter, reaction of the halo-boron compound and the hydroxy phosphonate proceeds quite readily to give the phosphinyl boron compounds, the latter are obtained in much better yields when using as reactants a halo-boron compound, a carbonyl compound, and a trivalent phosphorus ester. While reaction of the dialkyl phosphites and a carbonyl compound gives hydroxy phosphonates by an addition reaction.

the hydroxy phosphonates are not obtained when the dialkyl phosphite is replaced by a trialkyl phosphite.

The phosphinyl boron compounds of the present invention are stable, usually high-boiling materials which range from viscid liquids to waxy or crystalline solids. They are advantageously used as biological toxicants, e.g., as insecticides, fungicides, nematocides and bacteriostats; as hydrocarbon oil lubricants and gasoline additives; as functional fluids, e.g., in force-transmission media and dielectric applications; as plasticizers for synthetic resins and plastics; as rubber-compounding chemicals; and as flame-proofing agents for cellulosic and carbonaceous combustible materials in general, e.g., surface coatings, lacquers, polymers, resins and adhesives.

Those of the presently provided phosphinyl boron compounds which are gasoline-soluble are particularly useful as preignition additives for leaded gasolines. The invention thus provides an improved fuel for spark ignition internal combustion engines which consists essentially of gasoline, an organo lead anti-knock and a gasoline-soluble phosphinyl boron ester, said ester being present in said fuel in a quantity suflicient to suppress preignition of the fuel and sparkplug fouling.

Preignition is the ignition of the combustible mixture of air and fuel prior to firing by the sparkplug. This occurs when deposits of readily glowing material build up in the combustion chamber. When the fuel is a gasoline containing an organolead anti-knock together with a halohydrocarbon scavenger, such readily glowing deposits comprise carbon in a mixture with lead halides; the latter acting to reduce the normal ignition temperature of carbon. Since reduction of the ignition temperature tends to increase with increasing concentration of the organolead anti-knock, preignition is a problem which becomes particularly troublesome as use of high compression engines becomes more prevalent. The deposits of carbon and lead salt retain sufiicient heat from the previous firing cycle in sufiicient quantity to permit them to glow, and if the glowing period (which depends on case of ignition, and hence the lead content of the deposit) is long enough, the fuel is fired in the next cycle before it can be fired by the sparkplug. The erratic firing which thus results is demonstrated by a wild ping or a dull,

28 thudding knock. It is generally accompanied by increased detonation, sparkplug fouling, and reduction of exhaust valve life,

It has now been found that preignition and the various difliculties consequent thereto can be substantially suppressed or entirely eliminated by incorporating into the leaded gasoline a phosphinyl boron compound which is soluble in said gasoline in a preignition-inhibiting quan tity. Such a quantity, of course, will depend upon the content of organolead compound and halo-hydrocarbon scavenger in the fuel. Leaded gasolines usually contain an anti-knocking quantity of an organolead compound such as tetraethyllead, tetramethyllead, dimethyldiethyllead, and tetraphenyllead and substantially the amount of hydrocarbon halide scavenger, say, ethylene dibromide, ethylene dichloride, acetylene tetrabrornide, or monoor polyhalopropane, butane, or pentane, or polyhaloalkyl benzene, which is calculated to react with the organolead compound to give a lead halide, e.g., lead bromide when the organolead compound is tetraethyllead and the halohydrocarbon is ethylene dibromide. The quantity of the present phosphinyl boron compound which will suppress preignition of the leaded hydrocarbon fuel will depend upon the quantity of .lead present in the fuel and will vary from, say, 0.05 to 10.0 moles of said ester per atom of lead present in said fuel.

The present invention is illustrated by, but not limited to, the following examples:

Example 1 To a cooled (5 C.) mixture consisting of 32.8 g. (0.197 mole) of triethyl phosphite and 11.4 g. (0.197 mole) of propionaldehyde there was added, dropwise during 10 minutes, 32.0 g. (0.197 mole) of 4,4,6-trimethyl-2-chloro- 1,3,2-dioxaborinane at a temperature of 15-20 C. When the very vigorous reaction had subsided, ice-cooling was discontinued, the mixture was allowed to attain room temperature, and finally heated to 50 C. to assure complete reaction. The whole was then placed under water-pump vacuum to remove by-product ethyl chloride. Concentration to 100 C./0.1 mm. gave as residue 62 g. (97.7% theoretical yield) of the substantially pure 2-[1- (diethoxyphosphinyl)propoxy] 4,4,6 trimethyl 1,3,2-

dioxaborinane, 12 1.4346, and analyzing as follows:

Found Calcd. for

C13H28O6BP Percent C 48. 21 48. 57 8. 17 8. 7 6 3.15 3. 36 Percent P 9. 79 9. 62

Example 2 To a mixture consisting of 136.8 g. (0.822 mole) of triethyl phosphite and 47.8 g. (0.822 mole) of propionaldehyde there was added a solution consisting of 1.22 g. (0.822 mole) of 2-chloro-5,5-dimethyl-l,3,2-dioxaborinane in100 ml. of benzene during 0.5 hour at 22-28" C. Throughout the addition, an icebrine bath was used for cooling. The whole was heated to 70 C. subjected to water-pump vacuum and heated to 80 C. and finally concentrated to C./0.8 mm. There was thus obtained as residue 252 g. (99.3% theoretical yield) of the substantially pure 2-[1-(diethoxyphosphinyl)propoxy]5,5-dimethyl-1,3,2-dioxaborinane, which upon distillation gave a colorless product, B.P. 128-130 C./0.10.15 mm., 12 1.4415, which analyzed as follows:

29 Example 3 To 58.6 g. (0.298 mole) of diethyl 1-hydroxypropyl phosphonate in.50 ml. of methylene dichloride cooled to 2 C. there was added, dropwise during 0.25 hour, 44.3 g. (0.298 mole) of 2-chloro-5,5-dime'thyl-1,3,2-dioxaborinane. By the time all of the borinane compound had been added, the temperature of the reaction mixture had risen spontaneously to 40 C. The whole was then placed under water-pump vacuum, heated to 80 C. in order to remove the solvent and by-product hydrogen chloride, and distilled twice to give substantially pure 2- [1- (diethoxyphosphinyl)propoxy] 5,5 dimethyl 1,3,2 dioxaborinane, B.P. 128131 C./0.050.1 mm. 21 1.4419, and analyzing 3.78% B as against 3.52% B, the theoretical value.

Example 4 To a mixture consisting of 124.8 g. (0.75 mole) of triethyl phosphite and 35 g. (0.75 mole+2 g. excess) of acetaldehyde, cooled to 2 C., there was added, dropwise during 0.5 hour at 1520 C., a substantially equimolar quantity of a benzene solution of 2-bromo-5,5-dimethyl- 1,3,2-dioxaborinane, while maintaining the reaction temperature at 1525 C. by means of ice-cooling. The whole was then stirred for one hour at room temperature and subsequently placed under water-pump vacuum and warmed to 60 C. to remove solvent and any unreacted material and/or by-product. Distillation. of the residue gave 36.7 g. of product which upon redistillation gave substantially pure 2 [1 diethoxyphosphinyl)ethoxy]- 5 ,S-dimethyl-1,3,2-dioxaborinane, B.P., 111-114 C./ 0.05

mm., 1.4400, which analyzed as follows:

To a mixture consisting of 74.8 g. (0.41 mole) of diethyl 1-hydroxyethylphosphonate, 32.5 g. (0.41 mole) of pyridine and 150 ml. of anhydrous ethyl ether cooled to 6 C., there was added, dropwise during 0.3 hour, a substantially equimolar quantity of a benzene solution of 2 bromo 5,5 dimethyl 1,3,2 dioxaborinane while maintaining the temperature of the reaction mixture at 1216 C. by means of ice-cooling. When all of the borinane compound had been added, ice-cooling was discontinued and the Whole heated to reflux (52 C.) to insure complete reaction. The resulting mixture was then cooled to C., filtered, the filtrate placed under waterpump vacuum and heated to 50C. to. remove solvent. Distillation of the residue gave a 7 fraction, B.P. 130-135 C./0.22.1 mm. which, upon twice repeated distillation, gave the substantially pure 2-[1-(diethoxyphosphinyl)ethoxy]'- 5,5 dimethyl 1,3,2 dioxabori- 'nane, B.P.- 113-l14 C./0.05 mm., 74 1.4401, which analyzed as follows:

To a mixture consisting of 29.9 g. (0.180 mole) of triethyl phosphite and 16.9 g. (0.176 mole) of furfural there was added 28.6 g. (0.176 mole) of 2-chloro-5-methyl-5- ethyl-1,3,2-dioxaborinane during 0.2 hour at 5-15 C.

The reaction mixture was then warmed to 40 C. and concentrated to. a pot temperature of 80i C./0.3 mm. to give as residue 63.1 g. (99% theoreticalyield) of the substantially pure 2-[u ('diethoxyphosphinyl)furfuryloxy]- 5-ethyl-5-methyl-1,3,2-dioxaborinane, 11 1.4727, which analyzed 2.84% boron as against 2.99%, the calculated value. '7

Exampl 7 2 chloro 5 ethyl 5 methyl 1,3,2 dioxaborinane (35.7 g., 0.22 mole) was added, dropwis e during 0.45 hour, to a mixture consisting of 21.6 g'. (0.22 mole) of cyclohexanone and 36.6 g. (0.22 mole) of triethyl phosphite while maintaining the temperature of the reaction mixture at 10-15 C. by means of an ice bath. The whole was then heated to C. to, insure, complete reaction and finally concentrated to 107 C.'/0.7 mm. to give as residue 78.9 g. (99% theoretical yield) of the substantially pure 2-[1-(diethoxyphosphinyl)cyclohexyloxy]-5-ethyl-5-methyl-1,3,2-dioxaborinane, 21 1.4651.

Example 8 To a mixture consisting of 64.9 g. (0.521 mole) of triethyl phosphite and 32.8 g. (0.564 mole) of propionaldehyde there was added, with cooling, 70.3 g. (0.508 mole) of 2-chloro-4-methyl-1,3,2-dioxaborinane during 0.35 hour while maintaining the temperature of the reaction mixture at 1522 C. by means of an ice bath. The whole was then stirred at room temperature until therewas no further indication of an exotherrnal reaction and the mixture subsequently subjected to water-pumpvacuum to remove by-product methyl chloride. Concentration of the residue to 87 C./ 1.5 mm. gave as residue 134.3 g. (99.3% theoretical yield) of thesubstantially pure 2-[1- dimethoxyphosphinyl)propoxy] 4 methyl 1,3,2 dioxaborinane, 11 1.4420.

Example 9 2 chloro 5 ethyl 5 methyl 1,3,2 dioxaborinane (21.5 g., 0.132 mole) was added, dropwise during 0.1 hour, to a mixture consisting of 22.1 g. (0.132 mole) of triethyl phosphite and 18.6 g. (0.132 mole) of 2-chlorobenzaldehyde while maintaining the temperature of the reaction mixture at 1520 C. by means of ice-cooling. The whole was then heated to C. to insure complete reaction, placed under Water-pump vacuum and heated to C. to remove by-product, and finally concentrated to 115 C./ 1.0 mm. to obtain as residue the. substantially pure 2 [a (diethoxyphosphinyl)2 chlorobenzyloxy]- 5 ethyl 5 methyl 1,3,2 dioxaborinane, n 5 1.4952.

Example 10 To a mixture consisting of 110.2 g. (0.663 mole) of triethyl phosphite and 38.6 g. (0.663 mole) of propionaldehyde there was added, dropwiseduring 0.5 hour, a substantially equimolar quantity of 2-chloro-5-ethyl-4-propyl- 1,3,2-dioxaborinane while maintaining the temperature of the reaction mixture at 2227 C. by means of ice-cooling. The whole was then heated to C. to insure complete reaction, subjected to water-pump vacuum and warmed to 75 C. and finally concentrated to C./ 1.0 mm. to obtain as residue 235 g. of the substantially pure 2 [1 (diethoxyphosphinyl)propoxy] 5 ethyl 4- propyl-1,3,2-dioxaborinane, 11 1.4413.

Example 1] 2-chloro-1,3,2-dioxaborinane (30.7 g., 0.255 mole) was added during 10 minutes to a mixture consisting of 33.2 g. (0.255 mole) of ethyl 3-formylpropionate and 31.7 g. (0.255 mole) of trimethyl phosphite while maintaining the temperature at 2030 C. by means of an ice bath. The whole was then stirred until no further evidence of exothermic reaction and then placed under water-pump vacuum to remove by-product methyl chloride. Concentration of the remainder to C./2.0 mm. gave as residue 69.4 g. (93% theoretical ,yield) of the substan- 31 tially pure 2 [1 (dimethoxyphosphinyl) 3 carboethoxypropoxy1-1,3,2-dioxaborinane, 12 1.4521.

Example 12 To a mixture consisting of 70.5 g. (0.585 mole) of acetophenone and 72.6 g. (0.585 mole) of trimethyl phosphite there was added, dropwise during 20 minutes, a substantially equimolar quantity of 2-chloro-4-methyl-1,3,2- dioxaborinane while maintaining the temperature of the reaction mixture at 2030 C. by means of ice-cooling. The Whole was then stirred at room temperature, placed under water-pump vacuum, heated to 65 C. to remove the by-product and finally concentrated to 80 C./0.25 mm. There was thus obtained as residue 179.6 g. (94% theoretical yield) of the substantially pure Z-[u-(dimethoxyphosphinyl) on methylbenzyloxy] 4 methyl- 1,3,2-dioxaborinane, n 1.5048.

Example 1 3 To a mixture consisting of 111.2 g. (0.669 mole) of triethyl phosphite and 39.0 g. (0.669 mole) of propionaldehyde there was added, dropwise during 0.3. hour, 90 g. (0.669 mole) of 2-chloro-4-methyl-1,3,2-di0xaborinane at a temperature of 2028 C. The whole was then heated to 60 C. to insure complete reaction and subsequently to 80 C. under water-pump vacuum to remove by-product. Concentration of the remainder to 85 C./ 1.0 mm. gave as residue 197.7 g. (100% theoretical yield) of the substantially pure-2[l-(diethoxyphosphinyDpropoxy]-4-methy1-1,3,2-dioxaboriuane, 11 1.4372.

Example 14 Triethyl phosphite (91.3 g., 0.55 mole) and 34.8 g. (0.60 mole) of acetone were placed in a 500 cc. flask and stirred and cooled as 53 g. (0.50 mole) of 2-chloro-l,3,2- dioxaborolane in 75 ml. of methylene dichloride was added in 0.3 hour at a temperature of 1015 C. The whole was then allowed to attain 20 C. and distilled to remove material boiling below 110 C./0.6 min. There was thus obtained as residue the substantially pure 2-[2-(diethoxyphosphinyl -2-prop oxy] 1,3 ,2-dioxaborolane.

Example 15 A solution of 30.3 g. (0.19 mole) of 2-chloro-5-ethyl- S-methyl-1,3,2-dioxaborinane in 75 ml. of hexane was cooled to 79 C. and 28.0 g. (0.19 mole) of anhydrous chloral was added thereto during 0.2 hour while cooling with Dry Ice. The reaction mixture was then allowed to warm to 10 C., and 24.8 g. (0.20 mole) of trimethyl phosphite was added during 0.2 hour while maintaining the temperature of the reaction mixture at 15 C. When cooling was discontinued, the temperature of the reaction mixture increased spontaneously to a maximum of 34 C. The whole was then refluxed at 5560 C., for 0.5 hour and concentrated to a pot temperature of 94 C./0.4 mm. to give as residue 68.9 g. (97% theoretical yield) of the substantially pure 2[1-(diethoxyphosphinyl)- 2,2,2 trichloroethoxy]-5-ethyl-5-methyl-1,3,2-dioxaborimane, 11 1.4770, which analyzed to 2.72% boron and 26.51% chlorine as against 2.82% and 27.7% the calculated values.

Example 16 To a mixture consisting of 33.2 g. (0.20 mole) of triethyl phosphite and 21.6 g. of p-tolualdehyde, there was gradually added, with cooling, 28.8 g. (0.177 mole) of 2-chloro-5-ethyl-5-methyl-1,3,2-dioxaborinane during 0.2 hour at a temperature of -15 C. The reaction mixture was then warmed to 40 C. at water-pump pressure and then concentrated to 102 C./0.15 mm. in order to remowe unreacted material and zthe by-product ethyl chlo- Iide? Th??? R3? 1 13 obtained as residue 69.4 g. of the 32 substantially pure 2- m-(diethoxyphosphinyl)-4-methylbenzyloxy] 5 ethyl-S-methyl-1,3,2-dioxaborinane, 12 1.4913, which analyzed 2.64% boron as against 2.82%, the calculated value.

Example 17 A methylene dichloride solution of 2chloro-1,3,2- dioxaborinane was prepared by adding, dropwise, a solution consisting of 80.9 g. (0.218 mole) of tri-1,3-propanediol diborate in ml. of methylene dichloride to a solution of 25.6 g. (0.218 mole) of boron trichloride in 75 ml. of methylene dichloride at a temperature of 5 C. to 5 C. The methylene dichloride solution of the 2- chloro-l,3,2-dioxaborh1ane thus obtained was gradually added, during a time of 30 minutes, to a mixture consisting of 109.6 g. (0.655 mole) of triethyl phosphite and 38.2 g. (0.655 mole) of acetone, while maintaining the temperature at 13-20 C. by means of ice-cooling. When addition was completed, the whole was heated to reflux, placed under Water-pump vacuum and heated to 50 C. to remove the solvent and the by-product ethyl chloride. Concentration to 85 C./ 0.7 mm. gave as residue 185 g. of the substantially pure 2-[Z-(diethoxyphosphinyl)propoxy]-1,3,2-dioxaborinane, 713325 1.4438, and analyzing as follows:

Example 18 Boron trichloride was passed into 125 ml. of anhydrous ether until 19.3 g. (0.165 mole) had been absorbed. The whole was then added to a solution of 95.8 g. (0.575 mole) of triethyl phosphite and 32 g. (0.73 mole) of acetaldehyde with cooling at 10-25 C. during a time of 0.3 hour. When cooling was discontinued, the temperature of the reaction mixture increased spontaneously to reflux. The resulting colorless reaction mixture was then distilled to a pot temperature of C., placed under water-pump vacuum and concentrated first to a pot temperature of C. and finally to 145 C./ 0.2 mm. There was thus obtained as residue 93.5 g. of the substantially pure tris[l-diethoxyphosphinyl)ethyl]borate, n 1.4368, which analyzed as follows:

To 325 ml. of anhydrous ethyl ether cooled at -50 C. to -40 C. there was added 61.7 g. (0.526 mole) of boron trichloride. The mixture was allowed to warm to 10 C., at which point all of the complex which had formed went into solution. This solution was added, dropwise during 15 minutes, at a temperature of 1317 C. to a mixture consisting of 262.2 g. (1.58 mole) of triethyl phosphite and 91.9 g. (1.58 mole) of propionaldehyde. The whole was then heated to reflux (35 C.) and distilled to a temperature of 60 C. The residue was placed under water-pump vacuum, heated to 70 C. to remove the last of the lay-product and solvent, and then finally concentrated to C./ 1.5 mm. to give as residue 315 g. of the substantially pure tris[l'-('di ethoxyphosphinyl)propyl]borate which analyzed as follows:

Found Calcd. for

C21 4sBOi2 3 Percent O 42. 02 42. 28 Percent H- 7. 83 8.11 Percent B 1. 90 1. 81 Percent P 15. 43 15. 56

Example 20 Boron trichloride (117.0 g., 1.0 mole) was dissolved in 550 ml. of anhydrous ether cooled at 15 C. to 25 C. The whole was allowed to warm to C. and then added during 0.75 hour to a mixture of 645 g. (3.1 moles) of triisopropyl phosphite and 203 g. (3.5 moles) of propionaldehyde while maintaining the temperature of the reaction mixture at 16-20 C. by cooling. When cooling was discontinued, the temperature increased spontaneously to reflux (36 C.). When there was no further evidence of reaction, the mixture was distilled to a pot temperature of 80 C., placed under water-pump vacuum and warmed to 75C. and finally concentrated to a pot temperature of 108 C. 1.5 mm. to give as residue 720.5 g. of the substantially pure tris[l-(diisopropoxyphosphinyl)propyl]borate, 11 1.4347, which analyzed 1.47% boron and 13.60% phosphorus as against 1.59% and 13.68%, the respective calculated values.

Example 21 Boron trichloride (39.3 g., 0.335 mole) was absorbed in about 150 ml. of anhydrous ethyl ether while icecooling. Because some ethyl ether-boron trichloride complex separated out, additional ether was added to completely dissolve it. The resulting colorless solution was added, during 0.3 hour, to a solution (284 g.) of tris(2-chloroethyl) phosphite in 59 g. (1.34 moles) of acetaldehyde while maintaining the temperature of the reaction mixture at 1620 C. by means of ice-cooling. The whole was then gradually warmed to 80 C., placed under vacuum and concentrated to 96 C./2 mm. to obtain as residue 288 g. of the substantially pure tris{1- [bis (2-chloroethoxy) phosphinyl] ethyl}borate'.

Example 22 Boron trichloride (117.2 g., 1.0 mole) was dissolved in 600 ml. of anhydrous ether cooled at 30 C. to 50 C. Propylene oxide (58 g., 1.0 mole) was then added at a temperature of 50 C. to 70 C. during a time of 0.5 hour and the whole subsequently allowed to.

attain a temperature of 10 C. This solution was then added, during 0.5 hour, to a solution of 145 g. (2.5 moles) of propionaldehyde in 703 g. (2.1 moles) of trihexyl phosphite with cooling at 2028 C. Ether was removed from the reaction mixture by distillation to a pot temperature of 60 C., and distillation was continued under reduced pressure to remove material boiling below 132 C./0.05 mm. to give as residue 733.5 g. of the substantially pure 2-chloropropyl bis[1-(di-n-hexyloxyphosphinyl)propyl]borate, which analyzed 1.30% boron and 8.67% phosphorus as against 1.50% and 8.63%, the respective calculated values.

Example 23 Boron trichloride (203 g., 1.73 moles) was dissolved in l-liter of anhydrous ether contained in a 2-liter flask during 0.75 hour while employing Dry Ice cooling to maintain the temperature at 10 C. to 2S C. Propylene oxide (20 g., 3.46 moles) was then added during 0.75 hour at C. to 40 C. The resulting solution was allowed to warm to 10 C. and then added during 0.5 hour with cooling to a solution of 380' g. (1.83 moles) of triisopropyl phosphite and 144 g. (2.0 moles) of isobutyraldehyde at a temperature of 16-18 C. When the cooling bath was removed, the resulting mixture warmed spontaneously at reflux (39 C.) for 0.3 hour; The ether was then removed by distillation to 60 C., and the remaining colorless solution was concentrated to 125 C./0.2 mm. to give 768.3 g. of the substantially pure bis(2 -chloropropyl) 1-(diisopropoxyphosphinyl)2- methylpropyl borate, n 1.4383, which analyzed 7.36% phosphorus as against 7.13%, the calculated value.

Example 24 Boron tribromide (75 g., 0.3 mole) wasadded to stirred, anhydrous ether cooled in a DryIce bath at 5 C. to 15 C. during a time of 0.2 hour. To the resulting etherate there was then added 34.8 g. (0.6 mole) of propylene oxide during 0.3 hour at 15 C. to 25 C. When the colorless reaction mixture attained room temperature, it was added during 0.3 hour to a stirred solution of 49.8 g. (0.3 mole) of triethyl phosphite and 20.3 g. (0.35 .mole) of propionaldehyde at a temperature of 2530 C. with occasional cooling. The whole was then warmed at reflux for 0.5 hour, concentrated first to 65 C. under water-pump pressure and then to 103 C./ 0.2 mm. to give as residue 127 g. of the substantially pure bis(2 bromopropyl) 1 (diethoxyphosphinyl)propyl borate, which analyzed as follows:

Calcd. for

Anhydrous ether (500 ml.) was placed in a l-liter flask and stirred and cooled as 188.0 g. (1.60 moles) of boron trichloride was added during 1.25 hours at a temperature of 10 C. to 20 C. The resulting slurry was cooled further in Dry Ice as 186 g. (3.20 moles) of propylene oxide was added during a time of 0.75 hour, two-thirds of the oxide being added at 15 C. to 25 C. and the last one-third at -30 C. to -40 C. The resulting mixture was allowed to attain room temperature and was then added during a time of 0.75 hour to a solution of 453 g. (1.68 moles) of tris(2-chloroethyl)phosphite in 101.5 g. (1.75 moles) of propionaldehyde while main taining the temperature of the mixture at 1-l15 C. The whole was then concentrated to C./4 mm. to give 830 g. of the substantially pure bis(2-chloropropyl)-1- [bis 2-chloroethoxy) phosphinyl] propyl borate.

Example 26 To a mixture consisting of 16.6 g. (0.10 mole) of triethyl phosphite and 6.8 g. (0.10 mole plus 1 g. excess), of propionaldehyde, cooled to 5 C. there was added, dropwise during 0.15 hour, 19. 6 g. (0.10 mole) of n-butoxychlorophenylborane while maintaining the temperature of the reaction mixture at 10-20 C. by means of an ice bath. The whole was then heated to 60 C. to insure complete reaction, subjected to water-pump vacuum and heated to C. to remove the by-product, and finally concentrated to C./0.05 mrn.'to obtain as residue 35 g. (98.4% theoretical yield) of the substantially pure n-butyl 1-(diethoxyphosphinyl)propyl benzeneboronate, n 1.4780.

Example 27 To a mixture consisting of 8.3 g. (0.095 mole) of diethyl ketone and 15.9 g. (0.095 mole) of triethyl phosphite there was added, dropwise with stirring during 5 minutes, 19.1 g. (0.095 mole) of chlorodiphenylborane while maintaining the temperature of the reaction mixture at 10-15 C. by means of an ice bath. The whole was heated to 58 C. to insure complete reaction, placed under water-pump vacuum and heated to 60 C. to remove byproduct ethyl chloride and finally concentrated to 90 35 C./0.9 mm. to give as residue 35 g. (95% theoretical yield) of the substantially pure 3-diethoxyphosphinyl-3- pentyl diphenylborinate, n 1.5458.

Example 28 Dichlorophenylborane (19 g., 0.12 mole) was added, dropwise during 0.33 hour, to a mixture consisting of 29.8 g. (0.24 mole) of trimethyl phosphite and 15 g. (0.24 mole plus 1 g. excess) of propionaldehyde while maintaining the temperature at 1319 C. The whole was then heated to 60 C., subjected to water-pump vacuum and heated to 77 C. to remove by-product and finally concentrated to 90 C./ 0.1 mm. to give as residue 49.5 g. (97.7% theoretical yield) of the substantially pure bis 1- (diethoxyphosphinyl) propyl] benzeneboronate, 11 1.4870.

Example 29 Example 30 Di-n-butoxychloroborane was prepared by adding, dropwise during 0.4 hour, 50.7 g. (0.22 mole) of tri-nbutyl borate to a solution of 13.5 g. (0.11 mole) of boron trichloride in 75 ml. of methylene dichloride at a temperature of 65 C. to -70 C. and allowing the resulting reaction mixture to attain C. The resulting solution of the di-n-butoxychloroborane was then added, dropwise during 0.5 hour, to a mixture consisting of 138.9 g. of tris(2-ethylhexyl)phosphite, 25 ml. of methylene dichloride and 35.2 g. (0.33 mole) of benzaldehyde at a temperature which was maintained at 4-10 C. by an ice-salt bath. The whole was allowed to warm to room temperature and then heated to 70 C./2.0 mm. to remove solvent and by-product. Concentration to 142 C./2.0 mm. gave as residue 184 g. (98% theoretical yield) of the substantially pure dibutyl u-[bis(2-ethylhexyloxy)- phosphinyl]benzyl'borate, 11 1.4635.

Example 31 A methylene dichloride" solution of dichloro-n-decyloxyborane was prepared as follows: A 500 ml. flask equipped with thermometer, stirrer, Dry Ice condenser protected with a drying tube and a dropping tunnel was charged with 75 ml. of methylene dichloride, and 34.9 g. (0.298 mole) of boron trichloride was condensed in the flask whichwas immersed in a Dry Ice bath. There was then added thereto 47.1 g. of n-decyl alcohol during 25 min utes at 70 C. to -80 C. When all of the chloride had been added, the reaction mixture was gradually allowed to reach 0 C., at which point the reaction mixturewas placed under water-pump vacuum to remove hydrogen chloride. The residue was a solution of the dichloro-n-decyloxyborane' in methylene dichloride. This was added, dropwise during 25 minutes, to a cooled mixture consisting of 98.5 g. (0.596 mole) of triethyl phosphite and 38 g. (0.655 mole) of propionaldehyde at a temperature of 1-022 C. Upon discontinuing the coolin'g, thetemperature of the reaction mixture increased spontaneously to 40 C., and it was maintained at this temperature for 5 minutes to insure complete reaction. It was then subjected to water-pump vacuum and heated to 50 C. .to remove solvent and by-product ethyl chloride. Concentration to 120 C./0.9 mm. gave as residue 161.7 g. (97. 6% theoretical yield) of the substantially pure Tri-nbutyl borate (52.4 g., 0.22 mole) was added dropwise during one hour, to 13.4 g. (0.11 mole) of boron trichloride at a temperature of -70 C. to Cr Cooling was then discontinued, the mixture allowed to warm to 5 C. and ml. of anhydrous ethyl ether was added to dissolve the product. The resulting solution constituted an ether solution of chlorodi-n-butoxyborane. It was added, dropwise, to a mixture consisting of 57 g. (0.34 mole) of triethyl phosphite and 19.8 g. (0.34 mole) of propionaldehyde which had been cooled to 0 C. During the addition, the temperature of the reaction mixture was maintained at 511 C. The whole was then warmed to 35 C., subjected to water-pump vacuum and warmed to remove the ether solvent and the lay-product ethyl chloride. Concentration of the residue to 62 C./ 1.5 mm. gave 122.8 g. (100% theoretical yield) of the substantially pure dibutyl l-(diethoxyphosphinyl)propyl borate, 11 1.4219, which analyzed 8.21% phosphorus and 3.14% boron as against 8.79% and.3.0'8%, the calculated values.

Example 33 A solution of 1.48 moles of diallyloxychloroborane in an equal volume of methylene dichloride was cooled in; Dry Ice as 1.48 moles of chloral was added thereto dur-' ing a time of 0.5 hour. The resulting mixture was their allowed to warm to 20 C. and 190 g. (1.53 moles) o5 trimethyl phosphite was added during 0.6 hour with cooling to maintain the temperature of the reaction mixture at 15-30 C. The whole was then distilled to a pot temperature of 80 C. and the residue concentrated to 100. C./ 0.2 mm. to give as residue 471.5 g. of the substantially pure diallyl l-(dimethoxyphosphinyl)-2-trichloroethyl borate, 11 1.4782.

Example 34 To a cooled (2 C.) mixture consisting of 21.8 g. (0.11 mole) of diethyl phenylphosphonite and 6.4 g. (0.11 mole) of propionaldehyde there was added, dropwise during 10 minutes, a solution consisting of 17.7 g. (0.11 mole) of chlorodiallyloxyborane in 17.7 g. of methylene chloride. During addition of the boron compound the temperature of the reaction mixture was maintained at 10- 13 C. by means of an ice-bath. The whole was then heated to reflux (55 C.) to insure complete reaction. placed under water-pump vacuum and heated to 60 C. to remove the solvent and any by-product. Concentration to 90 *C./'0.1 mm. gave as residue 34.5 g. of the sub stantially pure diallyl 1 (ethoxyphenylphosphinyl)propyl borate.

Example 3 5 To a cooled mixture consisting of 5.4 g. (0.025 mole) of methyl diphenylphosphinite and 2.9 g. (0.050 mole) of propionaldehyde there was gradually added a solution of 4.0 g. (0.025 mole) of diallyloxychloroborane in an equal volume of methylene dichloride while employing ice-cooh ing. When all of the boron compound had been added, cooling was discontinued and the temperature of the reac: tion mixture was allowed to increase spontaneously to 40 C. The reaction mixture was then concentrated to a pot temperature of 80 C./0.1 mm. to give as residue 8.2 g. of the substantially pure diallyl. 1"(diQhCHY1PhOS? phinyhpropyl borate, 11 1.5680.

37 Example 36 To a cooled mixture consisting of 33.2 g. (0.2 mole) of triethyl' phosphite and 11.6 g. (0.2 mole) of propionaldehyde there was added, dropwise during 0.3 hour, 31.7 g. (0.14 mole) of bis(butylthio)chloroborane, using an ice-bath to maintain the temperature of the reaction mixture at 5-1 1 C. When all of the borane compound had been added the mixture was warmed to 30 C. and then concentrated to 90 C./0.1 mm. to give 48.9 g. (90% theoretical yield) of the substantially pure S,S- dibutyl l-(diethoxyphosphinyl)propyl dithioborate, analyzing 2.93% B as against 2.82% for the calculated value;

Example 37 To a mixture consisting of 34.9 g. (0.6 mole) of propionaldehyde and 74.5 g. (0.6 mole) of trimethyl phosphite there was gradually added 59.5 g. of dibromo(ethylthio)borane at a temperature of C. to 20 C. The whole was stirred until there was no evidence of reaction, filtered, and the filtrate placed under water-pump vacuum and heated to 50 C'. to remove by-prod-uct and excess reactants. Concentration to 98 C./ 0.6 mm. gave as residue the substantially pure S-ethy-l bis[l-(diethoxyphosphinyl) propyl1thioborate.

Example 38 To a cooled (5 C.) mixture consisting of 16.0 g. (0.127 mole) of 4-cyano2,2-dimethylbutyraldehyde and 21.2 g. (0.127 mole) of triethyl phosphite there was added, dropwise during 0.15 hour, 28.6 g. (0.127 mole) of bis(butylthio)chloroborane An ice-bath was used during addition of the boron compound to maintain the temperature of the reaction mixture at -15 C. When all of the boron compound had been added, the mixture was stirred until no further reaction was evident. It was then heated to 50 C. to insure complete reaction, placed under water-pump vacuum, and heated to 75 C. to remove any by-product. There was thus obtained as residue the substantially pure S,S-dibutyl l-(diethoxyphosphinyl)-2-dimethyl-4cyanobutyl dithioborate.

Example 39 Found Calcd. for

cisHssBNos s Percent B 2. 24 2. 43 Percent Cl 0.00 0.00 Percent N 2. 78 3.15 Percent P 13. 62 13. 9

Example 40 A solution consisting of 28.0 g. (0.108 mole) of bromodipiperidinobor'ane in an equal volume of benzene was added to a mixture consisting of 19.9 g. (0.12 mole) of triethyl phosphite and 8.7 g. (0.15 mole) of acetone, during 0.2 hour, while maintaining the temperature of the reaction mixture at 38 C. by means of ice-cooling. The whole was then warmed to 45 C., filtered and the filtrate concentrated to 92 C./ 0.05 mm. to give as residue 40 g. of the substantially pure dipiperidino-2-[(diethoxyphosphiny'l) propoxyJborane, n 1.4926.

Example 41 This example describes testing of some of the presently provided compounds for use as preignition-inhibiting agents in leaded fuels. It has been established that there is a close relationship between the quantity of a material required to suppress glow and'the effectiveness of the same material for reducing preignition of a leaded fuel in gasoline engines; accordingly, testing of the present compounds was conducted by a glow test method wherein the following procedure was employed:

Test blends were prepared by blending (l) 5 ml. of a fuel consisting of a high-boiling (380-420 F.) hydrocarbon fraction containing approximately mg. of lead based on the quantity of a commercial tetraethyllead-halohydrocarbon additive (hereinafter referred to as TEL) which had been incorporated therein and 1 ml. of an SAE 30 grade lubricating oil with (2) graduated, precisely weighed quantities of. one of the phosphinyl boron compounds to be tested, said quantities being in the range of 0.01 to 2.0 times the quantity of lead present. Twoml. of the testblend was-then dropped at a constant rate (1.5101 ml./15 minutes), during a 15l7 minute period, onto a reagent grade decolorizing carbon contained in a crucible maintained in a furnace at a temperature which was high enough to keep the bottom of the crucible at ca. 1000 F. By using test blends containing progressively lower quantities of the test compound, there was determined the minimum concentration of the test compound at which no glowing of the carbon was evidenced either during the dropping period or after all of the test sample had been added. Under these conditions, a control sample, i.e., one which contained all of the constituents of the test blend except the boron compound, caused the carbon to glow throughout addition thereof and after addition had been completed. On the other hand, no glowing was observed when there was present in the test blend the minimum concentration shown below of one of the following phosphinyl boron compounds per 5 ml. ofsaid fuel (A):

0.0400 g. of tris[l-(diethoxyphosphinyl)ethyl]borate (Example 18) 0.0853 g. of bis(2-bromopropyl)1-(diethoxyphosphin3d) propyl borate (Example 24) 0.0990 g. of dibutyl l-(diethoxyphosphinyl)propyl borate (Example 32) 0.0553 g. of 2-[l-(diethoxyphosphinyl)propoxy]-5,5-dimethyl-1,3,2-dioxaborinane (Example 2) 0.0697 g. of tris[1-(diisopropoxyphosphinyl)propyl]borate (Example 20) 0.0624 g. of 2-chloropropyl bis[l-(di-n-hexyloxyphosphinyDpropyl] borate (Example 22) Instead of the phosphinyl boron compounds shown above, there may be used, for the purpose of eifectively inhibiting preignition of leaded fuels, any of the gasoline soluble compounds provided by the present invention, the

data on the above compounds being supplied merely by way of illustrating the valuable properties of those of the compounds of the series which are prepared from relatively readily available raw materials. While, as will be obvious to those skilled in the art, the compound to be useful must be present in the gasoline in soluble form, it will also be realized that since the additive is employed in only very low concentrations, gasoline solubility at the useful concentrations is possessed by the great preponderance of the presently prepared com-pounds. Whether the phosphinyl boron compound is soluble in the gasoline at a concentration which is within the range of, say, from 0.01 to 2.0 volume per volume of organolead compound present in the gasoline can be readily ascertained by routine experimentation.

Inasmuch as the crude reaction mixture obtained by the present process comprises an aliphatic halohydrocarbon as by-product, the latter obviously can serve conveniently as the lead scavenger in leaded gasoline fuels containing the presently prepared boron-phosphorus cornpounds.

Leaded gasolines containing the presently prepared compounds are compatible with other additives customarily used in the art, e.g., rust-inhibitors, stabilizers or antioxidants, dyes, etc. Obviously, many variations can be made without departing from the spirit of the inven-- tion.

What is claimed is:

1. A hydrocarbon motor fuel of the gasoline boiling range adapted for spark ignition, internal combustion engines containing an effective anti-knock amount of an organo-lead compound, and in combustion therewith, from about 0.01 to 2.0 volumes per volume of organolead compound of a compound which has the formula wherein R is selected from the class consisting of alkyl, alkenyl, aryl, alkaryl, and aralkyl radicals of from 1 to 12 car-bon atoms, and such radicals linked at a carbon atom thereof to the boron through an element selected from the class consisting of oxygen and sulfur; (alkyl) N radicals having from 1 to 5 carbon atoms in each alkyl p;

radicals wherein D represents the necessary atoms to complete a saturated N-hetero ring of from 2 to 5 carbon atoms; and wherein two Rs taken together stand for a bivalent -O-alkylene-O radical having from 2 to 4 carbon atoms in the alkylene chain and a total of from 2 to 12 carbon atoms; n is an integer of to 2; Y is selected from the class consisting of hydrogen and alkyl radicals of from 1 to 12 carbon atoms when n is zero, and when n is 1 to 2, Y is selected from the class consisting of hydrogen and the radicals: alkyl of from 1 to 12 carbon atoms, furyl, thienyl and benzeuoid hydrocarbon which are free of aliphatic unsaturation and contain from 6 to 12 carbon atoms; and said radicals carrying a substituent selected from the class consisting of halogen, cyano, alkyl, O-alkyl and -COOalkyl where the alkyl radical has from 1 to 5 carbon atoms; Z is selected from the class consisting of hydrogen and alkyl radicals of from 1 to 3 carbon atoms and is alkyl only when n is from 1 to 2 and Z and Y taken together complete a cycloalkane ring having from 5 to 6 carbon atoms in the ring and a total of from 5 to 10 carbon atoms; and each A is selected from the class consisting of alkoxy, haioalkoxy, alkyl aryl, aralkyl, and alkaryl radicals of from 1 to 12 carbon atoms.

2. A hydrocarbon motor fuel of the gasoline boiling range adapted for spark ignition, internal combustion engines containing an effective anti-knock amount of an organo-lead compound, and in combustion therewith, from about 0.01 to 2.0 volumes per volume of organolead compound of a compound which has the formula in which R is a hydrocarbon radical of from 1 to 12 carbon atoms and alk and Y are alkyl radicals of from 1 to 12 carbon atoms.

3. A hydrocarbon motor fuel of the gasoline boiling range adapted for spark ignition, internal combustion engines containing an effective anti-knock amount of an organo-lead compound, and in combustion therewith, from about 0.01 to 2.0 volumes per volume of organolead compound of a compound which has the formula in which alkylene denotes a bivalent alkylene radical having from 2 to 4 carbon atoms in the alkylene chain and a total of from 2 to 12 carbon atoms and alk denotes an alkyl radical of from 1 to 12 carbon atoms.

, 4. A hydrocarbon motor fuel of the gasoline boiling range adapted for spark ignition, internal combustion engines containing an effective anti-knock amount of an organo-lead compound, and in combustion vtherewith, from about 0.01 to 2.0 volumes per volume of organolead compound of a compound which has the formula where Y and alk denote an alkyl radical of from 1 to 12 carbon atoms.

5. A hydrocarbon motor fuel composition as described in claim 4 wherein the compound of the formula is tris[1 (diethoxyphosphinyl) ethyl] borate.

6. A hydrocarbon motor fuel composition as described in claim 3 wherein the compound of the formula is 2-[1- (diethoxyphosphinyl)propoxy] 5,5-dirnethyl-1,3,2-dioxa borinane.

7. A hydrocarbon motor fuel composition as described in claim 10 wherein the haloalkyl bis[1-(dialkoxyphosphinyl)alkyl]borate is 2-chloropropyl bis[1-(di-n-hexyloxyphosphinyl) propyl] borate.

8. A hydrocarbon motor fuel composition as described in claim 4 wherein the compound of the formula is trisEl- (diisopropoxyphosphinyl propyl] borate.

9. A hydrocarbon motor fuel as described in claim 1 wherein the compound of the formula is a haloalkyl bis[1- (dialkoxyphosphinyl)alkylI-borate having from 1 to 12 carbon atoms in the haloalkyl group, and from 1 to 12 carbon atoms in each alkoxy group and alkyl group.

10. A hydrocarbon motor fuel as described in claim 1 wherein the compound of the formula is a dialkyl l-(dialkoxyphosphinyl)alkyl borate having from 1 to 12 carbon atoms in each alkyl and alkoxy group.

11. A hydrocarbon motor fuel as described in claim 1 wherein the compound of the formula is a bis(haloalkyl)- 1- (dialkoXyphosphinyDalkyl borate having from 1 to 12 carbon atoms in each haloalkyl group, and from 1 to 12 carbon atoms in each alkoxy and alkyl group.

References Cited by the Examiner UNITED STATES PATENTS 6/1960 Wagner 4476 2,944,085 7/1960 \Vaguer 4469 DANIEL E. VVYMAN, Primal Examiner. 

1. A HYDROCARBON MOTOR FUEL OF THE GASOLINE BOILING RANGE ADAPTED FOR SPARK IGNITION, INTERNAL COMBUSTION ENGINES CONTAINING AN EFFECTIVE ANTI-KNOCK AMOUNT OF AN ORGANO-LEAD COMPOUND, AND IN COMBUSTION THEREWITH, FROM ABOUT 0.01 TO 2.0 VOLUMES PER VOLUME OF ORGANOLEAD COMPOUND OF A COMPOUND WHICH HAS THE FORMULA 